1966 GMC LI3500 Performance Engines
Keep Your 1966 GMC LI3500 in Top Shape with Quality Performance Engines
Whether you’re repairing or upgrading your Performance Engine, using high-quality parts is key to keeping your 1966 GMC LI3500 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Engine Oil Pan Gaskets, Performance Engine Main Bearing Gasket Sets, and Performance Engine Valve Cover Gasket Sets. 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 1966 GMC LI3500 Performance Engine at Advance Auto Parts is around $41.87, with a range that starts at $22.99 and goes up to $74.99. With 4 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Engine Valve Cover Gasket Set, PERFORMANCE OIL PAN GASKET SET, and Performance Cylinder Head Gasket start at just $22.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Performance Engine, don’t forget to check out other key components like Performance Ignition Products and Performance Oil Filters. At Advance Auto Parts, we’re here to help you keep your 1966 GMC LI3500 in peak condition, inside and out.
Find Your Specific 1966 GMC LI3500 Performance Engines
Looking for the perfect Performance Engine for your 1966 GMC LI3500? You’re in the right place. Below, you’ll find links to various types of Performance Engines that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Performance Engines, ensuring durability and a precise fit for your GMC LI3500. Whether you’re driving a 1966 model or another popular model year like
1967, we’ve got you covered. Purchasing Performance Engines 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 Performance Engines that fit your vehicle.
Essential 1966 GMC LI3500 Performance Engines
FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1640)
from
$22.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions
Product Features:
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Product Features:
- Blue Stripe performance cork-rubber gaskets use cork particles evenly distributed throughout a rubber binder resulting in a compressible gasket without leak paths.
- Not intended for use in emission controlled vehicles.
FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1025)
from
$74.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions.
Product Features:
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Product Features:
- Fel-Pro Performance head gaskets accommodate the high cylinder pressures and cylinder head movement associated with performance engines.
- Inserted within a stainless steel armor surrounding each cylinder, wire ring design provides highly concentrated sealing around the combustion chamber.
- Raises combustion sealing force to roughly three times that of standard head gaskets.
- Steel wire rings for the greatest combustion seal strength.
- Not intended for use in emission controlled vehicles.
FEL-PRO Performance – Engine Crankshaft Seal Kit (Part No.2912)
from
$37.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.
Product Features:
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Product Features:
- Fluoroelastomer compound combines optimum resistance to heat, oils and abrasion for longevity.
- Optimizes performance under high crankcase vacuum conditions, elevated temperatures and high RPM levels.
- Not intended for use in emission controlled vehicles.
- Not intended for use in emission controlled vehicles.
FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1819)
from
$31.49
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions
Product Features:
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Product Features:
- Felcoid/Plus gaskets have a fiber sheet core and a latex rubber coating to eliminate potential leakage paths. The core material resists crushing and splitting, while providing excellent blowout resistance.
- With steel core to provide ultimate excellent blowout resistance.
- Not intended for use in emission controlled vehicles.
Popular 1966 GMC LI3500 Performance Engines Categories
Most Popular Performance Engine Oil Pan Gasket for 1966 GMC LI3500s
Enhance your 1966 GMC LI3500 with this popular Performance Engine Oil Pan Gasket we have in stock, for $31.49.
FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1819)
from
$31.49
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions
Product Features:
See More
Product Features:
- Felcoid/Plus gaskets have a fiber sheet core and a latex rubber coating to eliminate potential leakage paths. The core material resists crushing and splitting, while providing excellent blowout resistance.
- With steel core to provide ultimate excellent blowout resistance.
- Not intended for use in emission controlled vehicles.
Best-Selling 1966 GMC LI3500 Performance Engine Main Bearing Gasket Set
Upgrade your LI3500 with our best-selling Performance Engine Main Bearing Gasket Set.
FEL-PRO Performance – Engine Crankshaft Seal Kit (Part No.2912)
from
$37.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.
Product Features:
See More
Product Features:
- Fluoroelastomer compound combines optimum resistance to heat, oils and abrasion for longevity.
- Optimizes performance under high crankcase vacuum conditions, elevated temperatures and high RPM levels.
- Not intended for use in emission controlled vehicles.
- Not intended for use in emission controlled vehicles.
Top-Quality Performance Engine Valve Cover Gasket Sets for 1966 GMC LI3500s
Choose a high-quality OEM or aftermarket Performance Engine Valve Cover Gasket Set for GMC LI3500s and enjoy top-notch performance from $22.99.
FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1640)
from
$22.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions
Product Features:
See More
Product Features:
- Blue Stripe performance cork-rubber gaskets use cork particles evenly distributed throughout a rubber binder resulting in a compressible gasket without leak paths.
- Not intended for use in emission controlled vehicles.
Our Top Pick for a 1966 GMC LI3500 Performance Engine Cylinder Head Gasket
Invest in a
durable Performance Engine Cylinder Head Gasket for your 1966 GMC, knowing you’re getting trusted brands and expert craftsmanship.
FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1025)
from
$74.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions.
Product Features:
See More
Product Features:
- Fel-Pro Performance head gaskets accommodate the high cylinder pressures and cylinder head movement associated with performance engines.
- Inserted within a stainless steel armor surrounding each cylinder, wire ring design provides highly concentrated sealing around the combustion chamber.
- Raises combustion sealing force to roughly three times that of standard head gaskets.
- Steel wire rings for the greatest combustion seal strength.
- Not intended for use in emission controlled vehicles.
FAQs for 1966 GMC LI3500 Performance Engines
What are the best-selling Performance Engines for 1966 GMC LI3500s?
Out of 4 Performance Engines that fit 1966 GMC LI3500s, the following parts are the top sellers:
- Engine Valve Cover Gasket Set (19781133) – $22.99
- PERFORMANCE OIL PAN GASKET SET (19781547) – $31.49
- Performance Cylinder Head Gasket (19782471) – $74.99
What’s the price range for 1966 GMC LI3500 Performance Engines?
The prices of Performance Engines for the 1966 GMC LI3500 range from $22.99 up to $74.99 for the most premium parts.
What is the average price of a Performance Engine for a 1966 GMC LI3500?
The average price for Performance Engines for the 1966 GMC LI3500 is $41.87. Keep in mind the variety of part types within our Performance Engine category, where you are likely to find a wide range of prices across a variety of parts and components.
What are the cheapest Performance Engines for my 1966 GMC LI3500?
The cheapest 1966 GMC LI3500 Performance Engines we carry are:
- Engine Valve Cover Gasket Set (19781133) – $22.99
- PERFORMANCE OIL PAN GASKET SET (19781547) – $31.49
- Engine Crankshaft Seal Kit (19781945) – $37.99
- Performance Cylinder Head Gasket (19782471) – $74.99
Does Advance Auto Parts sell Performance Engines for any other 1966 GMC models?
Yes. We stock Performance Engines for 13 other popular 1966 GMC models. Some of the most popular are 1966 K15/K1500 Pickup Performance Engines, 1966 Suburban Performance Engines, 1966 G1000 Series Performance Engines, 1966 PB1000 Series Performance Engines, and 1966 I1500 Performance Engines.
What types of Performance Engines do you sell for my 1966 GMC LI3500?
As of 11/2/25, these are some of the most in-demand types of Performance Engines for a 1966 GMC LI3500:
Can I get help with 1966 GMC LI3500 Performance Engine orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Performance Engines and more.
What is your return policy for GMC LI3500 Performance Engines?
Advance Auto Parts keeps returns simple. For new GMC LI3500 Performance Engines and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.