Long Tube Header Race Manifold for Honda Civic SI & Acura RSX Base (2002-2006) Stainless SteelStainless Steel 4 2 1 Race Header with Downpipe for 2002 2005 Honda Civic Si & 2002 2006 Acura RSX Base 2. 0L The seventh generation Honda Civic Si and first generation Acura RSX Base share more than just Honda's legendary K20 enginethey share a philosophy. These cars represent Honda's commitment to naturally aspirated performance, proving that driving excitement doesn't require turbochargers or excessive displacement. With rev happy engines that sing