Keep in mind if you decide not to go with cats (which I did), you're going to smell fumes. Lots and lots of fumes! It will be like 1968 all over again LOL
I'm running E85 full time as well and have the ARH full exhaust system, without cats. (SC has no inspection...). It is an HPDE car that I have a lot of fun with. The ARH system sounds incredible and intimidates the hell out of people :cwl:
I have the Roush 20x9.5 (+45mm offset) wheels on my 2015 Mustang GT and need to get great road course tires for it.
The problem is that Roush recommends the 275/35R20 size, and I can't find any tires in that size that are comparable to the Bridgestone RE-71R tires that I've run on my 19 PP...