The Kooks 1-3/4 to 3 inch slip-on collector is a 4-into-1 304 stainless steel collector designed to join 1-3/4 inch primaries to a 3 inch outlet. It includes integral internal scavenging spike and two A/B style tabs to secure to primaries, and is intended to slip-fit over primaries then be welded or clamped. Sold individually and manufactured in the USA for header fabrication and custom exhaust builds.
Kooks Universal 1 3/4 x 3in SS Coll w/9-10in Long Body. Plus 2in for Slip