These Hooker BlackHeart LS Swap headers fit 1967-1969 GM F-Body (Camaro and Firebird) and 1968-1974 GM X-Body (Chevy Nova, Pontiac Ventura, Buick Apollo and Oldsmobile Omega) platforms, making it easier than ever to swap an LS-based engine into you classic muscle car. This header features mandrel-bent 1 7/8" primaries and 3" collectors to provide excellent exhaust flow and scavenging to ensure improved throttle response and increased power across the entire RPM-range. These headers were also engineered to tuck as closely to the car as possible to provide maximum ground clearance in lowered cars.