bolt ons
intake lid, bigger maf,intake manifold,throttle body, electric water pump,aluminum flywheel, carbon fiber driveshaft,underdrive pulley,intake track mods-all i can think of that are " bolt ons".
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i wouldnt consider aftermarket plugs or wires to be making any difference unless the stockers or ones in there are high milage(very high or broken for the wires). where as the aluminum flywheel is actually noticible.
anyways i got about almost every bolt on now except EWP, and a full dyno tune (not really bolt on but hp gainer)...keep the ls6 intake and ported throttle body until you go heads and cam, only worth like 5rwhp on a SI car, like ours...have fun








