i got a 01 blaster its all stock expect the exhaust system it has a fmf power core 2 muffle and fmf pipe and i opend my muffler and found this insalation stuff and one part of it looked like it was on fire at one time so i took it out and put the muffle back togeather and it sounds gud if i leave it like this will it hurt the moter in any way and my 2nd question is i pulled the head off of it to check the jug and every thing looked fine but the piston was a lil smaller than the bore but the ring touched the whole bore the piston not touchin the whole bore in the jug is a bad thing or no i still have a lot of power and did a compression test on a semi warm moter (been off for 15 mins) and it said i had 120 psi can some one help me out here