I have a K&n intake on my supra and 3 inch HKS downpipe sized down to open 2.5 inch exhaust all the way back.... Im running a solid 8 psi of boost with no other mods "yet :evil2:" . I understand about the diferences in octane and what the diferent octanes do as far as detonating and stuff, I run 93 octane now and my question is does the 110 octane race gas make a difference just by running it or do you need to tune to see a diff. ?? ive heard that it makes a little more power in other turbo engines just wondering what it will do in the 7m before i just got out and spend 7 bucks a gallon to find out for my self..