This aggressive race-only exhaust includes both mid and center pipes (bolt-on from the downpipes back) which eliminate the secondary catalytic converters. This eliminates a HUGE amount of exhaust restriction, opening the door for huge power gains, particularly on cars with increased boost. Made in the USA using the highest grade T-304 stainless. Includes mid pipes, center pipes, and rear muffler sections, as well as the correct size clamps for a completely bolt-on installation.