Corvette 1990-95 ZR1 X-pipe is made from 304 stainless steel for maximum corrosion resistance. 3" direct replacement for B&B resonator X-pipe with 3" ID all 4 ends and 4-1/8" center to center both ends with an overall length of 26". These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.