Weapon R Stainless Steel Headers are completely constructed of stainless steel and then polished to a show quality finish. These headers are second to none, when it comes to WR Racing Headers. Our Flanges are CNC machined and then welded inside and out to prevent cracking. We pride ourselves on our CNC Mendrel Bent tubes which are computer welded. These header are in back order till Mid of June , order now and get on the priroity list,