2.5" plumbing, IC has 3" in/out and is 4" thick, basically new setup, some paint chipping on the plumbing, 2.5" turbo intake pipe included, flanged for a 1g bov, which is also included. All couplers are Forced performance, with the exception of the 90 at the t-body. Buyer may need a few t-bolt clamps. $225 shipped.