ya my header is 4 to one headman. and i just finished my exhaust. its a 45 at the header and runs above all the X-members and is the purple hornie made by flow-tech at the end. it dumps at the back of my cab with no cat. i just cut off the bung for the o2 of the oem and welded it to my 2.25 pipe. works great and sounds better! not to loud at idel but when you get them rpm's rollin it sounds good and loud. im scared to take the doors of and run my tube doors lol