Looking for aftermarket parts to modify or upgrade your GMC C15 with catback? At Tunersports.com we carry a huge selection of the top name brand performance catback parts and accessories for your C15.
Whether you have a 1975 or 1978 GMC C15 in Base to Street Coupe trim we have you covered. We have 5 catback available to mod your C15. All parts have free shipping to the Continental US 48 States.
 SHIPS FROM MANUFACTURER 315566Gibson Single Side Exhaust is perfect for improved acceleration, maximum hill climbing, towing and passing power. This is our best performing Exhaust System. Exits behind the rear tire. Quieter in the cab than any other Performance Exhaust. Dyno test results show it makes maximum torque and horsepow... Gibson 77-86 GMC C1500 Base 5.0L 3in Cat-Back Single Exhaust - Aluminized 1975-1978 GMC C15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC C15 Indy Hauler 1977-1978 GMC C15 Heavy Half 1978-1978 GMC C15 Street Coupe $437.82 |
 SHIPS FROM MANUFACTURER 615566Gibson Single Side Exhaust is perfect for improved acceleration, maximum hill climbing, towing and passing power. This is our best performing Exhaust System. Exits behind the rear tire. Quieter in the cab than any other Performance Exhaust. Dyno test results show it makes maximum torque and horsepow... Gibson 77-86 GMC C1500 Base 5.0L 3in Cat-Back Single Exhaust - Stainless 1975-1978 GMC C15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC C15 Indy Hauler 1977-1978 GMC C15 Heavy Half 1978-1978 GMC C15 Street Coupe $574.30 |
 SHIPS FROM MANUFACTURER CT67725TS1967-87 Chevy/GMC Truck. Small Block/Big Block. CNC mandrel bent for optimal flow 304 2-1/2" stainless steel for maximum corrosion resistance. Designed to fit Stainless Works and most aftermarket headers. Dual chambered mufflers that lets the truck have an aggressive sound and great thing about this... Stainless Works Chevy/GMC Truck 1967-87 Exhaust 2.5in Turbo Muffler System 1975-1978 GMC C15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC C15 Indy Hauler 1977-1978 GMC C15 Heavy Half 1978-1978 GMC C15 Street Coupe $1,535.20 |
 SHIPS FROM MANUFACTURER CT6773CS1967-87 Chevy/GMC Truck. Small Block/Big Block. CNC mandrel bent for optimal flow 304 3" stainless steel for maximum corrosion resistance. Designed to fit Stainless Works and most aftermarket headers. Dual chambered round mufflers that lets the truck have an aggressive sound and great thing about th... Stainless Works Chevy/GMC Truck 1967-87 Exhaust Truck 3in Chambered System 1975-1978 GMC C15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC C15 Indy Hauler 1977-1978 GMC C15 Heavy Half 1978-1978 GMC C15 Street Coupe $1,535.20 |
 SHIPS FROM MANUFACTURER CT6773TS1967-87 Chevy/GMC Truck. Small Block/Big Block. CNC mandrel bent for optimal flow 304 3" stainless steel for maximum corrosion resistance. Designed to fit Stainless Works and most aftermarket headers. Dual turbo chambered mufflers that lets the truck have an aggressive sound and great thing about th... Stainless Works Chevy/GMC Truck 1967-87 Exhaust 3in Turbo Muffler System 1975-1978 GMC C15 Base / High Sierra / Sierra Classic / Sierra Grande 1977-1977 GMC C15 Indy Hauler 1977-1978 GMC C15 Heavy Half 1978-1978 GMC C15 Street Coupe $1,535.20 |