B Series 4-2-1 Tri-Y Header For B16 B18 VTEC Civic Integra Honda Acura

Fitment Information 1999 - 2000 Honda Civic Si (1.6L VTEC) 1994 - 1997 Honda Del Sol (1.6L VTEC) 1990 - 2001 Acura Integra (1.8L VTEC) *This header can only be installed on a B-series engine with a DOHC VTEC oil pan and requires a 2.5" adapter* Specs & Features Requires a 2.5" Adapter flange. Fits B-Series DOHC VTEC motors featuring 1 5/8" pipes with 2.5" collector flange. With the larger pipes and the larger 2.5" collector, it will immediately add horsepower. Totally redesigned to improve fitness and flow. Includes Hardware & Gaskets