The wait is finally over for the 5th Generation Camaro and without hesitation, A.R.H. has what you need to exhaust the beast within. Now available is our 100% U.S. made long tube 304 S/S header systems that are designed to fit great, install easily and produce outstanding horsepower and torque. Recent dyno testing of our 1-7/8" system with cats produced gains of 32 RWHP without a tune and 50 RWHP with a tune. RWTQ was up 45 ft. lbs after the tune. The system comes with everything you'd expect from A.R.H. This includes 3/8" thick flanges with tig welded and hand ported inlets, merge collectors with scavenger spikes, 200 cell metallic substrate cats, OEM style band clamps, Grade 8 hardware and Flat Out Racing Gaskets. The exhaust system is all 3" and extends to the rear axle where it reduces to 2-1/2" I.D. and mates to the factory exhaust. Primary sizes available are 1-3/4", 1-7/8" and 2". Collectors come standard at 3" but can be ordered at 3-1/2" or 4" for race application.