No drone at driving rpm when combined with CORSA Performance Exhaust Systems. 304 stainless steel building. Precision engineered principal tubes optimize physically fit and also overall performance. Car matched port geometry will increase exhaust flow and also eliminates leaks. Headers are shown as well as dyno tuned. Limited Lifetime Warranty. Built in the U.S.A. Long tube headers need a tune to eliminate check engine light coming from oxygen sensor relocation All CORSA headers are made from top quality stainless steel to give long-term performance, physical appearance and also sound. Quick bolt on set up. No welding needed. Detailed directions and...