I run the RPW's. I am using 2 1/2 CAT input and 2 1/2 CAT output. Using the Magnaflow 94006 - the requirement is a Magnaflow 53004 2" universal. But I have been using this model for years so everytime it needs to be replaced they just get the same one <img src="/forums/images/graemlins/wink.gif" alt="" />! I use a Magnaflow Muffler Flowthrough 2 1/2" and 2 1/2 inch pipe all the way back.

BS AKA Brian Schieck 1990 LWB 3.0L,RPW Hders HFCat,5.29 Gear+Detroit F/R,IronMan Tbars/ Coils,Rancho RSX9000,Dual bouncys,Thunder comp.,FlexALite Fan,Hellroaring DualBattSys,35" SuperSwamper Bogr's,Stage 1 cams,Ported Heads,ECU Jet Chipped