1977 GMC K25 Catalytic Converters
Keep Your 1977 GMC K25 in Top Shape with Quality Catalytic Converters
Whether you’re repairing or upgrading your Catalytic Converter, using high-quality parts is key to keeping your 1977 GMC K25 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Catalytic Converters. 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 1977 GMC K25 Catalytic Converter at Advance Auto Parts is around $269.99, with a range that starts at $126.99 and goes up to $480.99. With 3 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Standard Grade Universal Catalytic Converter – 2.50", California Universal Catalytic Converter – 2.5", and Direct-Fit Standard Grade Catalytic Converter start at just $126.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Catalytic Converter, don’t forget to check out other key components like Exhaust Manifold and Headers and Exhaust Mufflers. At Advance Auto Parts, we’re here to help you keep your 1977 GMC K25 in peak condition, inside and out.
Find Your Specific 1977 GMC K25 Catalytic Converters
Looking for the perfect Catalytic Converter for your 1977 GMC K25? You’re in the right place. Below, you’ll find links to various types of Catalytic Converters that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Catalytic Converters, ensuring durability and a precise fit for your GMC K25. Whether you’re driving a 1977 model or another popular model year like
1975,
1976, and
1978, we’ve got you covered. Purchasing Catalytic Converters 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 Catalytic Converters that fit your vehicle.
Essential 1977 GMC K25 Catalytic Converters
MagnaFlow – Standard Grade Universal Catalytic Converter – 2.50" (Part No.94016)
from
$126.99
MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 94016 helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design, cutting and welding is required. With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
Product Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Compact, lightweight construction enables installation in confined areas, welding is required
- Durable 308 stainless steel MIG welds
MagnaFlow – California Universal Catalytic Converter – 2.5" (Part No.339106)
from
$480.99
MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 339106 helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design (cutting and welding is required). With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
Product Features:
See More
Product Features:
- Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Compact, lightweight construction enables installation in confined areas, welding is required
- Durable 308 stainless steel MIG welds
MagnaFlow – Standard Grade Universal Catalytic Converter – 2.50" (Part No.94006)
from
$119.99
MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 94006 helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design (cutting and welding is required). With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
Product Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Compact, lightweight construction enables installation in confined areas, welding is required
- Durable 308 stainless steel MIG welds
MagnaFlow – Direct-Fit Standard Grade Catalytic Converter (Part No.93432)
from
$201.99
MagnaFlow Standard Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 93432 helps keep the check engine light off. DIY installation is easy with the proper tools, no cutting or welding required. With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment. This direct-fit catalytic converter is designed to fit the 1975-1986 Chevrolet C10, 1975-1986 Chevrolet K10, and additional vehicles. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
Product Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
- Simplifies installation with essential gaskets and hardware being included in the box
- Durable 308 stainless steel MIG welds
Walker – CalCat CARB Universal Catalytic Converter – 2.5" Inlet (ID) 2.5" Outlet (ID) (Part No.80906)
from
$611.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat Universal Catalytic Converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles.
Product Features:
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Product Features:
- CARB COMPLIANT – For use on OBDII vehicles, 1996 and newer and non-OBD 1995 and older. Legal for sale in CA, CO, NY & other states requiring CARB-compliant replacement converters. Consult your state’s aftermarket converter regulations.
- SUPERIOR TECHNOLOGY – Optimal high technology wash coat formulated to deliver superior performance (as compared to EPA-compliant converters)
- CONSISTENT PERFORMANCE – Utilizes a precise OE-style coating process to apply catalyst material to the substrate, providing consistent performance for assured emissions compliance
- DURABLE – Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION – Customizable design features expandable bushings for easy fitment and may require specialized fabrication and welding for installation
- BUY WITH CONFIDENCE – Backed by Walker’s 50,000-mile/80,000-kilometer emissions and structural integrity limited warranty
Popular 1977 GMC K25 Catalytic Converters Categories
Most Popular Catalytic Converters for 1977 GMC K25s
Enhance your 1977 GMC K25 with one of the 3 Catalytic Converters we have in stock, starting at just $126.99.
MagnaFlow – Standard Grade Universal Catalytic Converter – 2.50" (Part No.94016)
from
$126.99
MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 94016 helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design, cutting and welding is required. With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
Product Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Compact, lightweight construction enables installation in confined areas, welding is required
- Durable 308 stainless steel MIG welds
MagnaFlow – California Universal Catalytic Converter – 2.5" (Part No.339106)
from
$480.99
MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 339106 helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design (cutting and welding is required). With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
Product Features:
See More
Product Features:
- Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Compact, lightweight construction enables installation in confined areas, welding is required
- Durable 308 stainless steel MIG welds
MagnaFlow – Direct-Fit Standard Grade Catalytic Converter (Part No.93432)
from
$201.99
MagnaFlow Standard Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 93432 helps keep the check engine light off. DIY installation is easy with the proper tools, no cutting or welding required. With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment. This direct-fit catalytic converter is designed to fit the 1975-1986 Chevrolet C10, 1975-1986 Chevrolet K10, and additional vehicles. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
Product Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
- Simplifies installation with essential gaskets and hardware being included in the box
- Durable 308 stainless steel MIG welds
FAQs for 1977 GMC K25 Catalytic Converters
What are the best-selling Catalytic Converters for 1977 GMC K25s?
Out of 3 Catalytic Converters that fit 1977 GMC K25s, the following parts are the top sellers:
- Standard Grade Universal Catalytic Converter – 2.50" (16120087) – $126.99
- California Universal Catalytic Converter – 2.5" (50260699) – $480.99
- Direct-Fit Standard Grade Catalytic Converter (22317391) – $201.99
What’s the price range for 1977 GMC K25 Catalytic Converters?
The prices of Catalytic Converters for the 1977 GMC K25 range from $126.99 up to $480.99 for the most premium parts.
What is the average price of a Catalytic Converter for a 1977 GMC K25?
The average price for Catalytic Converters for the 1977 GMC K25 is $269.99. Keep in mind the variety of part types within our Catalytic Converter category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Catalytic Converters for other GMC K25 model years?
What are the cheapest Catalytic Converters for my 1977 GMC K25?
The cheapest 1977 GMC K25 Catalytic Converters we carry are:
- Standard Grade Universal Catalytic Converter – 2.50" (16120087) – $126.99
- Direct-Fit Standard Grade Catalytic Converter (22317391) – $201.99
- California Universal Catalytic Converter – 2.5" (50260699) – $480.99
Does Advance Auto Parts sell Catalytic Converters for any other 1977 GMC models?
Yes. We stock Catalytic Converters for 12 other popular 1977 GMC models. Some of the most popular are 1977 Jimmy Catalytic Converters, 1977 K15 Catalytic Converters, 1977 G25 Catalytic Converters, 1977 C25 Catalytic Converters, and 1977 C15 Catalytic Converters.
What types of Catalytic Converters do you sell for my 1977 GMC K25?
We currently have just 1 Catalytic Converter in stock for a 1977 GMC K25, and as of 11/2/25, it is a Catalytic Converter.
Can I get help with 1977 GMC K25 Catalytic Converter orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Catalytic Converters and more.
What is your return policy for GMC K25 Catalytic Converters?
Advance Auto Parts keeps returns simple. For new GMC K25 Catalytic Converters and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.