When we tuned it, we were running pump fuel. 93. A boost meter is definitely my next add. It's a daily commuter car as well. So it gets plenty of miles. The bpv is made by Perrin. I'm only going with known brands. Perrin said that 90% of applications won't need adjustments made to the valve. Mud flaps and all season matts yeah definitely on already. This is hands down the best car I have owned yet.