The 95a? I wasn't sure if that was too excessive. But I also have no idea what the durometer is on the Cobb. I might go for it anyway, I don't wanna end up regretting getting the 88a. How's the vibration at idle with AC? It's hot where I live so AC is on 100% of the time for most of the year. Does it feel like getting a back massage like the other guy said? Also I read this is generally fixable by just getting your idle RPM raised by about 50 in your tune. Have you done anything like that?