Tire,wheel&suspension mods for a 400-500whp.

[Thraxbert]

I really, really love a beefy front sway bar on this car. Feels so responsive!

But I would say tires, wheels, and traction rods.

Edit: and diff lockdown.

Edit 2: and Amsoil blue ATF in the transmission.

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[iPan]

@Vinny if you're running 295 or 305 tires, you will probably want an 11 inch wheel because the tread will be pinched on a 10.5in. Will it technically be fine on 10.5? Sure, but definitely not optimal. Whatever gains you see on a 295 or 305 on a 10.5 inch wheel will be more from tire compound than anything, as opposed to a 275 on a 10.5 inch wheel. The extra width on the tire is wasted when it doesn't have adequate wheel width supporting it.