3" Inetermediate pipe used by Whisper 3" Catbacks. Can be used with MadDad, Stromung, H and S, and serveral other 3" Axlebacks sections. We have confirmed fitment with the brands mentioned. If an axleback is designed to fit like the factory axleback but uses a 3" flange this would be a suitable pipe. Check with your axleback vendor before ordering if you are uncertain about fitment for your application. This pipe uses a donut gasket flange on the side that mates with your downpipe. Works great with the factory downppe, Cobb downpipes or others that use the factory style 2.5" donut gasket
