PRODUCT IS FOR RACE USE ONLY!!!!!!!!!!!!! Our Texas Speed & Performance long tube headers for 1997-04 C5 & Z06 Corvettes are built from high-quality 304 stainless steel. They feature 1-3/4" primary tubes with 3" collectors, and they are mandrel-bent on a CNC mandrel bender for 100% ensured accuracy. When combined with our TSP 3" off-road x-pipe, up to 25 rear-wheel horsepower gains can be seen! We will include a pair of GM MLS exhaust gaskets, as well as the necessary clamps, to complete the installation. A pair of plug-and-play O2 extensions are now included in this package for no additional charge! Tuning will also be required with any long tube header system to turn the rear O2 sensors off to avoid any "service engine soon" lights. The headers are designed to be a slip-fit connection with both x-pipe systems and will bolt up to most axle-back exhaust systems on the...