This system is constructed of 1-7/8 IN - 3 IN mandrel-bent 304 stainless steel tubing for maximum strength and durability. Factory style laser cut machined mild steel flanges are used used for a secure leak-free seal. A mitered merge collector is used to decrease turbulence and increase exhaust velocity resulting in increased horsepower, torque and improved throttle response. Utilizing factory style and flanges this system is designed to fit in the stock locations with no cutting or modifications required for a hassle-free installation. Utilizing state-of-the-art computer-aided design technology, this system is designed for custom, high tolerance factory fitment. 100% MIG-Welded for race-proven strength and durability. Twisted Steel 1-7/8 IN to 2-3/4 IN 304 Stainless Header w/ Raw Finish Jeep Wrangler 392 21-24 V8-6.4L Jeep Wrangler 392 21-24 V8-6.4L