Our LT1 headers and Y's are made out of 321 Polished Stainless Steel. The highest quality stainless you can get to make exhaust parts out of. The headers feature a 1 3/4" to 1 7/8" stepped design. The ports in the flanges are oversized to provide more flow and no restrection. The LT1 headers also feature a High Velocity Merge collector and merge spike. The collectors and Y are 3".
If you purchase the Headers and either the Y or the True Duals we will refund you a $50 discount after you purchase them.