This Kooks 2-1/4" inlet to 4" outlet stainless slip-on collector is a 4-into-1 design with a 9–10-inch body plus 2 inches for slip overlap. It features the patented Kooks scavenging spike and includes two A/B-style tabs to secure the collector to primaries. Sold individually, the collector is intended for high-flow header assemblies and provides a smooth merge into a larger-diameter outlet.
Kooks Universal 2 1/4in x 4in SS Coll w/9-10in Long Body. Plus 2in for Slip