ARH - Long Tube Headers & X-Pipe (97-04 Corvette C5)With Race Inspired Technology built into every system; you're looking at the very best the performance exhaust industry has to offer. Our C5 systems are available with 1 3 4" or 1 7 8" primaries and your choice of 3" x 3" or 3" x 2 1 2" catted or non catted X pipe mid section. Of course, these are manufactured using the highest quality 304 S S available and require no modifications to install.