This is a specialty steel pipe put together by ProCharger. This pipe is commonly found on SBC/BBC kits without an intercooler. Normally this pipe gets connected via silicone boots between the outlet of the blower and the inlet of the carb hat. On both ends of the 3.5" tube there are bead rolled flanges to aid in silicone hose retention. The pre-welded flange on the tube is for the use of one of ProCharger's Race Bypass Valves allowing you to simply bolt the valve on with no welding required. The product only comes in a black finish.
If you would also like to purchase the hose and clamp kit commonly used with this pipe, please search for PN: 3CAAI-010 or add it to the cart by selecting it using the options to the right of the product.