A buddy located a deal for me on 2015+ Roush 20 x 9.5 wheels and I discovered they would not fit front of my 2011 with brembo. I purchased a pair of 5mm spacers to see if they were enough. Nope, they still didn't clear the calipers, in fact, both spacers on one hub didn't clear either...
What kind of performance loss should I expect to see when going from 11 to 1 stock pistons to 10 to 1 Manley forged pistons? I don't have a good apples to apples comparison but my car doesn't rip like it did before.
What parameters are changed in regards to tuning for 10 to 1? I purchased a...