Cats cost you 10 hp. I know that when I started changing gears on mine the stock tune was poop. I had mine road tuned, we set the convertor lock up and shift points. To give you an idea of how much it can affect you my SCT chip has four positions. Position 0 is street tune car runs 13.60's pos. 2 & 3 are track tunes, car runs 12.80's - 13.20's depending on the 60'. It makes a world of difference.
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True Blue 2002 GT Premium 4r70W
1/8 8.205@ 84.780
1/4 12.874@ 107.20
Bolt on's n/a
NMRA #7703
Dyno'd at Modular Depot 251 hp. 291 Tq.
4.30's, 3500 Stall converter, Steeda upper & Lowers, Tokico drag struts, M & M frame connectors, P & A valve body, C&L plenum, Accufab 75mm TB, Jet Hot Long tubes, Hooker O/R X, Steeda catback,SCT tune,Steeda pullies.
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