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1988 GMC R2500
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60-Day Returns
Lifetime Replacement
1988 GMC R2500

1988 GMC R2500 Catalytic Converters

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No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Magnaflow®
No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Part Number: M6694009
Guaranteed to Fit
$119.00
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 5.7L Cutting And Welding Required
  • 1988 GMC R2500 High Sierra 8 Cyl 7.4L Under 15000 Lb. Gvw; Cutting And Welding Required
  • 1988 GMC R2500 Base 8 Cyl 5.7L Cutting And Welding Required
  • 1988 GMC R2500 Sierra Classic 8 Cyl 5.7L Cutting And Welding Required
  • 1988 GMC R2500 Base 8 Cyl 7.4L Under 15000 Lb. Gvw; Cutting And Welding Required
  • 1988 GMC R2500 Sierra Classic 8 Cyl 7.4L Under 15000 Lb. Gvw; Cutting And Welding Required
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 3 in. Inlet/Outlet; 16 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : Magnaflow 25,000 Mile Limited WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Standard Grade SeriesTube Material : Stainless Steel
No Returns Accepted - Rear Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal, Semi-Universal (Welding Required)
Magnaflow®
No Returns Accepted - Rear Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal, Semi-Universal (Welding Required)
Part Number: M66334009
Guaranteed to Fit
$202.00
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 5.7L EO# D-193-104; Cutting And Welding Required
  • 1988 GMC R2500 Base 8 Cyl 5.7L EO# D-193-104; Cutting And Welding Required
  • 1988 GMC R2500 Sierra Classic 8 Cyl 5.7L EO# D-193-104; Cutting And Welding Required
Product Details
Location : RearEmissions : CARB and Federal EPA Standards, 50-state LegalNotes : 3 in. Inlet/Outlet; 16 in. overall lengthType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-193-104Gasket Included : Without GasketWarranty : Magnaflow 5 year / 50,000 Mile WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : California SeriesTube Material : Stainless Steel
Standard Grade Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Magnaflow®
Standard Grade Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: M6693476
Guaranteed to Fit
$272.00
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 5.7L
  • 1988 GMC R2500 High Sierra 8 Cyl 7.4L To 15000 Lb. Gvw
  • 1988 GMC R2500 Base 8 Cyl 5.7L
  • 1988 GMC R2500 Sierra Classic 8 Cyl 5.7L
  • 1988 GMC R2500 Base 8 Cyl 7.4L To 15000 Lb. Gvw
  • 1988 GMC R2500 Sierra Classic 8 Cyl 7.4L To 15000 Lb. Gvw
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 26 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : Magnaflow 25,000 Mile Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Standard Grade SeriesTube Material : Stainless Steel
No Returns Accepted - Front Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal, Semi-Universal (Welding Required)
Magnaflow®
No Returns Accepted - Front Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal, Semi-Universal (Welding Required)
Part Number: M66333009
Guaranteed to Fit
$338.00
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 5.7L EO# D-193-104; Cutting And Welding Required
  • 1988 GMC R2500 Base 8 Cyl 5.7L EO# D-193-104; Cutting And Welding Required
  • 1988 GMC R2500 High Sierra 8 Cyl 7.4L EO# D-193-104; Cutting And Welding Required
  • 1988 GMC R2500 Sierra Classic 8 Cyl 5.7L EO# D-193-104; Cutting And Welding Required
  • 1988 GMC R2500 Base 8 Cyl 7.4L EO# D-193-104; Cutting And Welding Required
  • 1988 GMC R2500 Sierra Classic 8 Cyl 7.4L EO# D-193-104; Cutting And Welding Required
Product Details
Location : FrontEmissions : CARB and Federal EPA Standards, 50-state LegalNotes : 3 in. Inlet/Outlet; 16 in. overall lengthType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-193-104Gasket Included : Without GasketWarranty : Magnaflow 5 year / 50,000 Mile WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : California SeriesTube Material : Stainless Steel
California Series Direct Fit Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal
Magnaflow®
California Series Direct Fit Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal
Part Number: M663391476
Guaranteed to Fit
$914.00
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 5.7L EO# D-193-132; With Single Catalytic Converter
  • 1988 GMC R2500 Base 8 Cyl 5.7L EO# D-193-132; With Single Catalytic Converter
  • 1988 GMC R2500 Sierra Classic 8 Cyl 5.7L EO# D-193-132; With Single Catalytic Converter
  • 1988 GMC R2500 Base 8 Cyl 7.4L EO# D-193-132; With Single Catalytic Converter
  • 1988 GMC R2500 High Sierra 8 Cyl 7.4L EO# D-193-132; With Single Catalytic Converter
  • 1988 GMC R2500 Sierra Classic 8 Cyl 7.4L EO# D-193-132; With Single Catalytic Converter
Product Details
Emissions : CARB and Federal EPA Standards, 50-state LegalNotes : (1) Converter Quantity; 3 in. Main Piping Diameter; Clamp-On Inlet and Outlet Attachment; Stainless Steel Material; Ceramic Substrate Material; 26.25 in. overall lengthType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-193-132Gasket Included : Without GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 5-year or 50,000-mile Magnaflow limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : California SeriesTube Material : Stainless Steel
Standard Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Walker®
Standard Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: WK15693
Guaranteed to Fit
$195.49
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 5.7L With 26-1/4 in. Overall Length
  • 1988 GMC R2500 Base 8 Cyl 5.7L With 26-1/4 in. Overall Length
  • 1988 GMC R2500 Sierra Classic 8 Cyl 5.7L With 26-1/4 in. Overall Length
Product Details
Location : CenterEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 26.25 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Walker limited warranty on catalytic performance and 5-year or 50,000-mile structural integrity warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Standard SeriesTube Material : Stainless Steel
No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Eastern®
No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Part Number: EAST70957
Guaranteed to Fit
$201.99
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 7.4L RWD, Undercar
  • 1988 GMC R2500 Base 8 Cyl 7.4L RWD, Undercar
  • 1988 GMC R2500 Sierra Classic 8 Cyl 7.4L RWD, Undercar
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 16 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : 5-year or 50,000-mile Eastern limited warrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Standard SeriesTube Material : Aluminized Steel
No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Walker®
No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Part Number: WK16346
Guaranteed to Fit
$444.99
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 5.7L To 11,000 GVWR
  • 1988 GMC R2500 Base 8 Cyl 5.7L To 11,000 GVWR
  • 1988 GMC R2500 Sierra Classic 8 Cyl 5.7L To 11,000 GVWR
  • 1988 GMC R2500 Base 8 Cyl 7.4L To 11,000 GVWR
  • 1988 GMC R2500 High Sierra 8 Cyl 7.4L To 11,000 GVWR
  • 1988 GMC R2500 Sierra Classic 8 Cyl 7.4L To 11,000 GVWR
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 28 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : 5-year or 50,000-mile Walker limited warrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Standard SeriesTube Material : Stainless Steel
No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Walker®
No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Part Number: WK15043
Guaranteed to Fit
$141.49
Vehicle Fitment
  • 1988 GMC R2500 High Sierra 8 Cyl 5.7L For Units With 26-1/4 in. Overall Length
  • 1988 GMC R2500 Base 8 Cyl 5.7L For Units With 26-1/4 in. Overall Length
  • 1988 GMC R2500 Sierra Classic 8 Cyl 5.7L For Units With 26-1/4 in. Overall Length
Product Details
Location : CenterEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 18 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : 25,000-mile Walker limited warranty on catalytic performance and 5-year or 50,000-mile structural integrity warrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Standard SeriesTube Material : Stainless Steel
OEM Grade Series Semi-Universal (Welding Required) Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Magnaflow®
OEM Grade Series Semi-Universal (Welding Required) Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: M6659959
Universal Fit
$161.00
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 3 in. Inlet/OutletProduct Fit : Semi-Universal (Welding Required)Recommended Use : Performance ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : Magnaflow 25,000 Mile Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : OEM Grade SeriesTube Material : Stainless Steel
OEM Grade Series Semi-Universal (Welding Required) Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Magnaflow®
OEM Grade Series Semi-Universal (Welding Required) Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: M6659956
Universal Fit
$161.00
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 2.5 in. Inlet/OutletProduct Fit : Semi-Universal (Welding Required)Recommended Use : Performance ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : Magnaflow 25,000 Mile Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : OEM Grade SeriesTube Material : Stainless Steel
No Returns Accepted -Catalytic Converter
Catco®
No Returns Accepted -Catalytic Converter
Part Number: CAT602387
Universal Fit
$152.49
Product Details
Product Fit : UniversalRecommended Use : OE ReplacementProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

No Returns Accepted -Catalytic Converter
Catco®
No Returns Accepted -Catalytic Converter
Part Number: CAT608387
Universal Fit
$158.99
Product Details
Product Fit : UniversalRecommended Use : OE ReplacementProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

No Returns Accepted -Catalytic Converter
Catco®
No Returns Accepted -Catalytic Converter
Part Number: CAT608386
Universal Fit
$158.99
Product Details
Product Fit : UniversalRecommended Use : OE ReplacementProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

No Returns Accepted -Catalytic Converter
Catco®
No Returns Accepted -Catalytic Converter
Part Number: CAT608395
Universal Fit
$159.99
Product Details
Product Fit : UniversalRecommended Use : OE ReplacementProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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Product Questions & Answers

Catco No Returns Accepted -Catalytic Converter
$159.99
Q:Will this work with a 5.0 mustang?
Jose R.
A:BEST ANSWERHi Jose, I am pleased to assist you. This universal catalytic converter can technically be used with a 5.0 Mustang. However, careful consideration of compatibility and installation requirements is necessary for optimal performance. The converter is EPA and CARB approved, which is beneficial for compliance. Installation will require custom modifications, including cutting and welding of the exhaust system to fit properly on a 5.0 Mustang. If you're interested, you can click the link below to order directly and take advantage of our current discounts while supplies last. I hope this helps, and enjoy shopping! https://www.carparts.com/catalytic-converter/catco/cat608395?can=CPGG4850_CSQA_20241203 Show less
Grace G.
 
1 Question, 1 AnswerView all Q&As >