Need a tune after thus for sure. Either canned or help from others HP Tuners but With what I have in the top end supporting mods for 3.4 Pulley with no KR, CNC Ported heads, on my 04 GTP, not sure what type of power I'll be working with. I just decided to upgrade my stock chains to the GXP Gimini Chain set. Torque Converter is new stock. So thinking I might be good with just stock Flexplate.
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