GMC G25 Catalytic Converter

EASTERN CATALYTIC CONVERTER

Eastern catalytic converters are constructed using Eastern's proprietary NANO technology chemistry that yields highly efficient loadings for lower cost and better converter efficiency. It features high flow design that maximizes engine output and catalytic efficiency.

Specifications

• 3-way catalyst style
• 6,000 lb GVW
• Without air tube provision and oxygen sensor port
• Oval body
• 6 x 4.25 x 10 in. body, 14 in. overall length
• 2.5 in. inlet diameter
• 2.5 in. outlet diameter
• Single inlet and outlet configuration

Notes

• 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses
• Non-directional and can be installed either way
• Modification of the exhaust is required

Fits the following 1975-1978 GMC G25 submodels:

• 1977-1978: Rally STX; 8 Cyl 5.0L;
• 1977-1978: Rally; 8 Cyl 5.0L;

• 1977-1978: Vandura; 8 Cyl 5.0L;

• 1975-1977: Rally STX; 8 Cyl 5.7L;

• 1975-1977: Rally; 8 Cyl 5.7L;

• 1975-1977: Vandura; 8 Cyl 5.7L;

Fits 4 more submodels. (Show all) Show less info

MAGNAFLOW 49-STATE SEMI-UNIVERSAL CATALYTIC CONVERTER

• Not legal for use in California or in states adopting the California emissions standards
• Semi-universal design – cut out your old catalytic converter and weld in the new one
• Stainless Steel Construction
• Legendary Magnaflow quality, power, and sound
• Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These 49-State Legal semi-universal catalytic converters have a catalyst specifically designed for your vehicle – just cut out your old catalytic converter and weld in the new one.  Engineered to cut emissions and improve performance.

Fits the following 1975-1978 GMC G25 submodels:

• 1978-1978: Vandura; 6 Cyl 4.1L; "GAS, Naturally Aspirated"
• 1977-1978: Rally STX; 8 Cyl 5.0L; "GAS, Naturally Aspirated"

• 1977-1978: Rally; 8 Cyl 5.0L; "GAS, Naturally Aspirated"

• 1977-1978: Vandura; 8 Cyl 5.0L; "GAS, Naturally Aspirated"

• 1975-1978: Rally STX; 8 Cyl 5.7L; "GAS, Naturally Aspirated"

• 1975-1978: Rally; 8 Cyl 5.7L; "GAS, Naturally Aspirated"

• 1975-1978: Vandura; 8 Cyl 5.7L; "GAS, Naturally Aspirated"

Fits 5 more submodels. (Show all) Show less info

CATCO CATALYTIC CONVERTER

Catco catalytic converters are designed with 409 stainless steel pipes and shell for longer life.

Specifications

• Oval body
• 24.75 in. overall length
• 2.5 in. inlet diameter
• 2.5 in. outlet diameter
• Single inlet and outlet configuration

Notes

49-state legal; Not for sale or use in California; Cannot be shipped to California addresses

Fits the following 1978-1978 GMC G25 submodels:

• 1978-1978: Vandura; 6 Cyl 4.1L;

BOSAL CATALYTIC CONVERTER ASSEMBLY

Bosal catalytic converters are made to fit vehicle-specific requirements for backpressure, emissions, sound levels, and sensors. Designed and built for long life reliability.

Specifications

• Standard assembly with one catalytic converter
• Oval body
• Single inlet and outlet configuration

Notes

• 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses

Fits the following 1975-1978 GMC G25 submodels:

• 1978-1978: Vandura; 6 Cyl 4.1L;
• 1977-1978: Rally STX; 8 Cyl 5.0L;

• 1977-1978: Rally; 8 Cyl 5.0L;

• 1977-1978: Vandura; 8 Cyl 5.0L;

• 1975-1978: Rally STX; 8 Cyl 5.7L;

• 1975-1978: Rally; 8 Cyl 5.7L;

• 1975-1978: Vandura; 8 Cyl 5.7L;

Fits 5 more submodels. (Show all) Show less info

WALKER CATALYTIC CONVERTER

Walker catalytic converter features stainless steel body, aluminized expandable bushings and heat shield for enhanced strength and durability.

Specifications

• Higher loaded substrate
• Oval body
• 18 in. overall length
• 2.5 in. inlet diameter
• 2.5 in. outlet diameter

Notes

• Direct fit catalytic converter legal for sale in California under Executive Order (EO) number D-182-46. Before purchasing this product, please check the Executive Order at www.arb.ca.gov to verify whether this product is allowed for installation on your specific vehicle application

Fits the following 1978-1978 GMC G25 submodels:

• 1978-1978: Rally STX; 8 Cyl 5.0L;
• 1978-1978: Rally STX; 8 Cyl 5.7L;

• 1978-1978: Rally; 8 Cyl 5.0L;

• 1978-1978: Rally; 8 Cyl 5.7L;

• 1978-1978: Vandura; 6 Cyl 4.1L;

• 1978-1978: Vandura; 8 Cyl 5.0L;

• 1978-1978: Vandura; 8 Cyl 5.7L;

Fits 5 more submodels. (Show all) Show less info