pantera1975
10-14-2010, 08:01 PM
What size pipe should I use for a down spout extension on my 86 250r with a fmf turbine core muffler. The the way the muffler comes form from FMF its shootinh the noise almost straight back and if I put on somthing thats bent at a 45 deg angle hopefully it helps with the wisconsin DB test. So should I use 1 1/4 inside dia pipe like what FMF uses or should I go smaller?