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i have owned my 04 for about 3 months now. it is stone stock. i have read everything possible about what this engine likes mod wise. a lot of folks rag on the 03-06 exhaust system, well a huge kawa tuner [ ivans] did a dyno compairson between a muzzi 4-2-1 and it only made 1 HP over stock.i am thinking of doing the air box lid mod [ about 4 HP] and leaving the stock exhaust on the bike. i get lots of compliments on how nice the 4 pipes look. the sound is a little on the quiet side but the tone is nice. my openion the air box lid mod will work just fine without putting the 4-1 exhaust on.
yes i understand to maximize the bike i need the air box lid mod and a PC111 with a good pipe. but i can do the air box mod for free. i doubt the stock exhaust is really holding back the gains from the lid mod.
yes i understand to maximize the bike i need the air box lid mod and a PC111 with a good pipe. but i can do the air box mod for free. i doubt the stock exhaust is really holding back the gains from the lid mod.