well, i guess i'll piggyback on zuma here......i grabbed a p5, exhaust, and some other important info from monty.i finally got my mugen together and long story short, my nitro days are back in full-swing! in fact, they will last as long as they are selling/running nitro my motor had the bench break in, so i just ended up running about 12-1300cc of fuel through it. started to tweak the tune a bit and it was still SUPER smooth and on point. as for mileage, i actually got jusssst over 13 minutes a few times (medium sized track, and running just about to what it would take to qualify for the a main). if i didnt have to leave early, i'm sure i'd have another line here about how well it helped me in that main! whatever monty does, he does it well!!! THANKS!!!