This Aluminum T-pipe is designed to have a Greddy Type S BOV (or compatible) attached directly to it. The required mounting hardware should have been included with your BOV (they are not included with this item.)
This T-pipe also has a lip on both ends to firmly hold your couplers in place.
BOV is sold separately.This T-Pipe works perfectly with our Type 4, Type 5, Type 6, or Type 7 BOV.