by mblux on Sun, 10 Aug 2008 9:59 +0000
hi i too have a dp chip and its great i have opened the exhuast up but was advised not to reduce back pressure by too much or it would lose power , so i went for 2.5 with a straight thru muffler . it could be a bit better sound but it s ok ? i too love that whistle my last toyo 100 was turbo with 4" mandrel straight thru no muffler .it whistled and was loud and offensive .