Hi Flow Exhaust System Header Pipes Shorty Tubes. 3.7L VQ37VHR V6 / 3.5L VQ35HR V6. Correct for models with Tronic T5 (RED colored cassette) ONLY not correct for models with Tronic T7 (black colored cassette). (2) Hi Flow Stainless Exhaust Headers 3to1 Design.Professional Installation is Highly Recommended (No Instruction Included). All custom orders Seats, Shocks etc. Tracking numbers are updated manually, so please allow enough time for your information to be entered after your order has been placed. We are not responsible for install mistakes. The RA # must be on the outside of each package with the RA # in a visible area. Any package without the RA # will be refused.