JBA Exhaust Headers for Chevy GMC Silverado 1500 Sierra 1500 4.3L V6 - 1842S-9JS valves 6L V8 1967 GMC K15/K1500

6L V8 1967 GMC K15/K1500 Pickup 283/4

6 V8 1976 - 1983 Chevrolet Malibu 305/5 V8 1978 - 1985 Chevrolet Monte Carlo 305/5 V8 1976 - 1977 Chevrolet Monte Carlo 1970 - 1975 Chevrolet Monte Carlo 400/6

Key bottle valve features include a 1/8"NPT gauge port

7L V8 1984 - 1989 GMC S15 Base 173/2

JBA Exhaust Headers for Chevy GMC Silverado 1500 Sierra 1500 4.3L V6 - 1842S-9JS valves 6L V8 1967 GMC K15/K1500Overview: 03 13 GM Truck Cat4Ward 4. 3L Silver Ctd JBA shorty headers are one of the foremost performance upgrades you can bestow upon your beloved car, truck, or SUV. JBA Headers are significantly less restrictive than stock manifolds and dramatically increase the power and efficiency of your engine. Each header is constructed from durable stainless steel to endure the abuse of racing, towing, and daily driving built to withstand it all. JBAs