hi! I run a mach 28 in my buggy and i have the same problem with the exhuast running extremely hot! It has melted my stone gaurds, body and tank. I use a temp gun and my engine is running at 250 + or - a couple of degrees. I talk to someone at the track that was running the same engine and he said his exhuast runs extremely hot aswell. I am using a nosram inline exhaust, but will be trying the hyper 8 exhuast to see if that makes a difference at my next meet. will let you know how it went if i remember!