With Race Inspired Technology built into every system, you're looking at the very best the performance exhaust industry has to offer. Our C6 ZR1 systems are available with 1-3/4", 1-7/8" or 2” 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. All systems come standard with merge collectors and scavenger spikes. We also use the highest quality and best flowing metallic substrate catalytic converters available and all systems assemble with Grade 8 hardware and Accuseal S/S band clamps.