American Racing Headers Stainless Steel Long Tube Headers for 2010 Camaro Live everything American Racing Headers builds, these new systems are made here in the USA using the highest qualit 304 Stainless Steel. Available in 1-3/4" or 1-7/8" primairies with merged collectors and scavenger spikes standard, ARH's sysem gaurantees outstanding performance with great fit and very easy install. Other features include 3/8" thick stainless steel flanges ith hand ported inlets and 200 cell metallic substrate cats.