1990-95 ZR1 full length headers. All tubes are CNC mandrel bent for optimal flow. Made from 304 stainless steel for maximum corrosion resistance. Starting with a CNC cut 3/8″ thick flanges into 2″ primaries and 3″ slip fit collectors. Headers only. Dyno proven 30 rwhp gain over stock. Mill finish. Headers are fully TIG welded and back purged. These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.