2004 Peterbilt 320 Fuel Injectors
Keep Your 2004 Peterbilt 320 in Top Shape with Quality Fuel Injectors
Whether you’re repairing or upgrading your Fuel Injector, using high-quality parts is key to keeping your 2004 Peterbilt 320 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Fuel Injector O-Ring Kits and Fuel Injectors. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 2004 Peterbilt 320 Fuel Injector at Advance Auto Parts is around $580.99, with a range that starts at $97.99 and goes up to $735.99. With 5 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like Fuel Injector, Fuel Injector, and Fuel Injector start at just $700.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Fuel Injector, don’t forget to check out other key components like Fuel Pumps and Fuel Sensors. At Advance Auto Parts, we’re here to help you keep your 2004 Peterbilt 320 in peak condition, inside and out.
Find Your Specific 2004 Peterbilt 320 Fuel Injectors
Looking for the perfect Fuel Injector for your 2004 Peterbilt 320? You’re in the right place. Below, you’ll find links to various types of Fuel Injectors that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Fuel Injectors, ensuring durability and a precise fit for your Peterbilt 320. Whether you’re driving a 2004 model or another popular model year like
2010,
2011,
2012,
2013,
2014,
2015,
2016,
2017, and
2018, we’ve got you covered. Purchasing Fuel Injectors from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Fuel Injectors that fit your vehicle.
Essential 2004 Peterbilt 320 Fuel Injectors
Delphi – Fuel Injector (Part No.EX634762)
from
$724.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX631766)
from
$439.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX639349)
from
$359.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX634763)
from
$735.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX634761)
from
$700.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX631763)
from
$439.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX631756)
from
$476.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX631767)
from
$439.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Cardone – Fuel Injector (Part No.2J-504)
from
$388.99
CARDONE Remanufactured Fuel Injectors provide an alternative plug and play solution to fuel delivery for diesel applications. All units are flow tested and balanced and replaced with new O-rings and gaskets. Each unit retains OEM duty cycle and pulse width ensuring reliable performance. All units are built to meet or exceed OEM performance, providing a quality product both you and your vehicle can rely on.
Product Features:
See More
Product Features:
- All gaskets, O-rings and bearings are replaced 100 percent to ensure optimal performance
- Each assembled unit is individually calibrated and tested to ensure it meets or exceeds O.E.M. form, fit and function
- All components are renewed or replaced as necessary to ensure high quality and durability
- When applicable, improvements based on typical failure modes of original units are incorporated into the design and manufacture of replacement component parts, which translates into longer service life and less down-time for the driver
- Guaranteed fit and function
- Meets or exceeds O.E.M. performance.
Cardone – Fuel Injector (Part No.2J-350)
from
$644.99
CARDONE Remanufactured Fuel Injectors provide an alternative plug and play solution to fuel delivery for diesel applications. All units are flow tested and balanced and replaced with new O-rings and gaskets. Each unit retains OEM duty cycle and pulse width ensuring reliable performance. All units are built to meet or exceed OEM performance, providing a quality product both you and your vehicle can rely on.
Product Features:
See More
Product Features:
- All gaskets, O-rings and bearings are replaced 100 percent to ensure optimal performance
- Each assembled unit is individually calibrated and tested to ensure it meets or exceeds O.E.M. form, fit and function
- All components are renewed or replaced as necessary to ensure high quality and durability
- When applicable, improvements based on typical failure modes of original units are incorporated into the design and manufacture of replacement component parts, which translates into longer service life and less down-time for the driver
- Guaranteed fit and function
- Meets or exceeds O.E.M. performance.
Dorman – HD Solutions – Fuel Injector O-Ring Kit (Part No.904-8055)
from
$38.49
The components in this fuel injector O-ring kit are designed to match the fit of the original O-rings on specified vehicles. They are engineered to help ensure leak-free connections to the fuel injectors during service or when the rings are damaged.
Product Features:
See More
Product Features:
- Direct replacements – the components in this fuel injector O-ring kit are designed to match the fit of the original O-rings on specified vehicles
- Ideal solution – engineered to help ensure leak-free connections to the fuel injectors during service or when the rings are damaged
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Dorman – HD Solutions – Injector O-Ring Kit (Part No.904-8052)
from
$179.99
The components in this fuel injector O-ring kit are designed to match the fit of the original O-rings on specified vehicles. They are engineered to help ensure leak-free connections to the fuel injectors during service or when the rings are damaged.
Product Features:
See More
Product Features:
- Direct replacements – the components in this fuel injector O-ring kit are designed to match the fit of the original O-rings on specified vehicles
- Ideal solution – engineered to help ensure leak-free connections to the fuel injectors during service or when the rings are damaged
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Dorman – HD Solutions – Injector O-Ring Kit (Part No.904-8053)
from
$97.99
The components in this fuel injector O-ring kit are designed to match the fit of the original O-rings on specified vehicles. They are engineered to help ensure leak-free connections to the fuel injectors during service or when the rings are damaged.
Product Features:
See More
Product Features:
- Direct replacements – the components in this fuel injector O-ring kit are designed to match the fit of the original O-rings on specified vehicles
- Ideal solution – engineered to help ensure leak-free connections to the fuel injectors during service or when the rings are damaged
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Popular 2004 Peterbilt 320 Fuel Injectors Categories
Most Popular Fuel Injector O-Ring Kit for 2004 Peterbilt 320s
Enhance your 2004 Peterbilt 320 with this popular Fuel Injector O-Ring Kit we have in stock, for $97.99.
Dorman – HD Solutions – Injector O-Ring Kit (Part No.904-8053)
from
$97.99
The components in this fuel injector O-ring kit are designed to match the fit of the original O-rings on specified vehicles. They are engineered to help ensure leak-free connections to the fuel injectors during service or when the rings are damaged.
Product Features:
See More
Product Features:
- Direct replacements – the components in this fuel injector O-ring kit are designed to match the fit of the original O-rings on specified vehicles
- Ideal solution – engineered to help ensure leak-free connections to the fuel injectors during service or when the rings are damaged
- Durable construction – designed and manufactured to strict specifications for reliable performance
- Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
Best-Selling 2004 Peterbilt 320 Fuel Injectors
Upgrade your 320 with one of our 4 best-selling Fuel Injectors.
Delphi – Fuel Injector (Part No.EX634763)
from
$735.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX634762)
from
$724.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Delphi – Fuel Injector (Part No.EX634761)
from
$700.99
Delphi knows OE technology and how to service diesel systems. For more than 60 years, we have partnered with 25 OEM’s to bring our OE diesel powertrain knowledge and expertise to the aftermarket. Delphi diesel systems operate at high performance to meet today’s tough emissions standards and are built to OE specifications for the fit, form, and function technicians expect. Trust Delphi for an unrivalled, cost-effective diesel program to help build your business.
Product Features:
See More
Product Features:
- 100% O Ring replacement
- All Delphi injectors are tested utilizing OE methodologies
- Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
- No internal seal rings equals minimized leakage
- Recessed fuel exit minimizing possible plugging
- Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
- Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock
Cardone – Fuel Injector (Part No.2J-350)
from
$644.99
CARDONE Remanufactured Fuel Injectors provide an alternative plug and play solution to fuel delivery for diesel applications. All units are flow tested and balanced and replaced with new O-rings and gaskets. Each unit retains OEM duty cycle and pulse width ensuring reliable performance. All units are built to meet or exceed OEM performance, providing a quality product both you and your vehicle can rely on.
Product Features:
See More
Product Features:
- All gaskets, O-rings and bearings are replaced 100 percent to ensure optimal performance
- Each assembled unit is individually calibrated and tested to ensure it meets or exceeds O.E.M. form, fit and function
- All components are renewed or replaced as necessary to ensure high quality and durability
- When applicable, improvements based on typical failure modes of original units are incorporated into the design and manufacture of replacement component parts, which translates into longer service life and less down-time for the driver
- Guaranteed fit and function
- Meets or exceeds O.E.M. performance.
FAQs for 2004 Peterbilt 320 Fuel Injectors
What are the best-selling Fuel Injectors for 2004 Peterbilt 320s?
Out of 5 Fuel Injectors that fit 2004 Peterbilt 320s, the following parts are the top sellers:
- Fuel Injector (11126318) – $735.99
- Fuel Injector (11126301) – $724.99
- Fuel Injector (11126417) – $700.99
What’s the price range for 2004 Peterbilt 320 Fuel Injectors?
The prices of Fuel Injectors for the 2004 Peterbilt 320 range from $97.99 up to $735.99 for the most premium parts.
What is the average price of a Fuel Injector for a 2004 Peterbilt 320?
The average price for Fuel Injectors for the 2004 Peterbilt 320 is $580.99. Keep in mind the variety of part types within our Fuel Injector category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Fuel Injectors for other Peterbilt 320 model years?
What are the cheapest Fuel Injectors for my 2004 Peterbilt 320?
The cheapest 2004 Peterbilt 320 Fuel Injectors we carry are:
- Injector O-Ring Kit (12083304) – $97.99
- Fuel Injector (10612133) – $644.99
- Fuel Injector (11126417) – $700.99
- Fuel Injector (11126301) – $724.99
- Fuel Injector (11126318) – $735.99
Does Advance Auto Parts sell Fuel Injectors for any other 2004 Peterbilt models?
Yes. We stock Fuel Injectors for 5 other popular 2004 Peterbilt models. Some of the most popular are 2004 379 Fuel Injectors, 2004 330 Fuel Injectors, 2004 378 Fuel Injectors, 2004 357 Fuel Injectors, and 2004 385 Fuel Injectors.
What types of Fuel Injectors do you sell for my 2004 Peterbilt 320?
As of 11/2/25, these are some of the most in-demand types of Fuel Injectors for a 2004 Peterbilt 320:
Can I get help with 2004 Peterbilt 320 Fuel Injector orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Peterbilt Fuel Injectors and more.
What is your return policy for Peterbilt 320 Fuel Injectors?
Advance Auto Parts keeps returns simple. For new Peterbilt 320 Fuel Injectors and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.