Fluid,
I just put a 3.4" pulley on this past friday also. Like you said it's a lot more responsive. I just love the way it pulls from a dead stop now. Let me know how your FWI goes and if you can post some pics. I have have some 3" exhaust tubing I'm thinking of powdercoating black to use to fab one up with.
Fred
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2004 GTP/WS6 Sport Red Metallic
3.4" pulley,GMPP cat-back,180 stat,Evo5 rims