Rev9Power Rev9_AC-078; SSQV Blow Off Valve Adaptor Tube(2.5 Inch) Product Details Aluminum blow off valve (BOV) adapter tube 2.5" fits all SSQV blow off valves "- 2.5" piping size - 100% aluminum for easy intercooler piping welding - easily matches with the aluminum intercooler piping - light weight one-piece aluminum - polished look - beaded roll edge to prevent leakage