Kooks Universal 1 7/8in x 3in SS Coll w/9-10in Long Body. Plus 2in for Slip

What you get with this Kooks merge collector is a 1-7/8 inch inlet ID that slips over your 1-7/8 inch primary pipes, leading to a 3 inch OD outlet. It's a 4-into-1 design, built from 304 stainless steel for good corrosion resistance. This collector also includes two A/B style tabs, which are used to secure it to your primary pipes.

This collector features Kooks' patented scavenging spike, an internal component designed to help improve exhaust scavenging. Scavenging is when the exhaust pulse from one cylinder helps pull the exhaust gases out of another cylinder, which can lead to a more efficient burn and potentially more power. The 304 stainless steel construction means it's well-built for the high temperatures and corrosive environment of an exhaust system. Kooks has been in the performance exhaust business for a long time, and they handcraft their products in the USA.