Hey check out Speed & Engineering they are a sponsor on here. They are lil pricey around $700.00, but you get what you paid for and they fit 4x4's. Like I said earlier had them over a year with not a single problem or exaust leak. You will like the tone and power they will give your truck.
http://speed-eng.com/store/product_i...oducts_id=2359

 

TByrne has ASM headers as well as several other kinds. Check them out as well.