Who has been running one of the “BIG” tunes? Something like the Stage 4R or 5R from Evo/HCT or equivolent from BMP running 20-21psi.

How much of a difference did you really feel vs. a Stage 3 15-16psi tunes?

Any issues so far?

What clutching are you using?

Clutch/belt issues?

Did you choose 95+ Octane Gasoline or E85?

For those that went E85, how much more fuel are you using?


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