The Jeep specialist at St. Louis' Axleboy Off-Road install RIPP Long Tube headers into a JK Wrangler. These T304 stainless direct bolt-in headers are manufactured to give incredible performance and a flawless fit. Standard 3/8" thick flanges, merge-style collectors with scavenger spikes and severe duty metallic substrate cats. Plug-and-play Oxygen sensor extensions, and O2 bungs for relocating factory O2's are all included for a perfect install . The stock exhaust heat shields bolt back in place, so you don't run into trouble with under hood plastics like many aftermarket headers. This system is the highest quality and most powerful for the Jeep Wrangler. Don't get fooled by short tube designs or make your decision based on just price. These headers truly deliver. The three piece bolt together design, which provides an easy installation in comparison to the competition. Tig welded and hand ported 3/8" thick flanges mate perfectly and make sure the gaskets will not leak. Fully welded 3 into 1 merge collectors with Scavenger Spikes assure equal exhaust pulsations. Also included are two - 200 cell ultra high flow metallic substrate cats which keep things legal and eliminate the worry for pesky check engine lights. These are the best headers for that JK Wrangler, they will provide on average of 35lbs/ft of torque and it comes in 600 RPM sooner than stock! 25 rear-wheel HP gains will give excellent throttle response throughout the RPM range. This is a perfect matchup for MBRP exhaust systems!