Doug Thorley Headers THY-630Y-C Exhaust Header for Jeep Grand Cherokee ZJ V8 Reviewhttp://tinyurl.com/l8f4wwm Doug Thorley Headers THY-630Y-C Exhaust Header for Jeep Grand Cherokee ZJ V8 Made in the USA with limited lifetime warrantyExtra thick 14GA tubing and 3/8 inch thick flangesCeramic coated inside and outKit includes all required gaskets and/or installation hardwareCARB approved, 50 state smog legal