SLEYPR, the Y-pipe mod is the first thing you should do. Other then that you're looking at significant money for HP gains with marginal gains in TQ.

BTW, I've got an MSDS Y-Pipe w/cat that I might be selling. If you're interestred PM me.

Regards, Alan

03 Volvo S60 2.5T AWD 98 Mystique 2.5 MTX 99 SVT - Inheriting Lil Monster's parts 98 SVT - Lil Monster (RIP) 183.7 whp Quaife/Fidanza/UR UD Clutch AFE/MSDS/SHO-Y/Bassani/MagnaCore GC/Koni/22mmR/EndLinks/ES/ KVR Slotted/1144's/SS Lines/MASItaly