These Hooker RacingHeart headers are for Street Stock cars with Small Block Chevy engine. They fit 1973-1974 GM A-Body vehicles as well as 1970-1974 GM F-body vehicles. They have 1-3/4 inch primaries with 3 inch collectors, 3/8 inch thick flanges to prevent warping and have merge spears for increased velocity. These are Natural Stainless Steel.
These Hooker RacingHeart headers are for Street Stock cars with Small Block Chevy engine. They fit 1973-1974 GM A-Body vehicles as well as 1970-1974 GM F-body vehicles. They have 1-3/4 inch primaries with 3 inch collectors, 3/8 inch thick flanges to prevent warping and have merge spears for increased velocity. These are Natural Stainless Steel.