Differance in power between open muffler and open muffler with header?greenspun.com : LUSENET : MV Agusta F4 : One Thread
Does anyone know what the power differance is between the open exhaust muffler with the chip and the full exhaust kit ie. open muffler, header and chip? I am getting ready to get a new exhaust and don't want to spend the additional $1100.00 for the header if the gains are minmal. Thanks for the advise.
-- Scott Armstrong (firstname.lastname@example.org), September 16, 2003
Trust me, go for the headers for real hp increase!
-- Jorge (email@example.com), September 16, 2003.
The MV Agusta Special Parts header is a work of art. Unlike the stock 4-2-2 setup, it is configured in a 4-2-1-2 with balance tubes between the headers.
With the combination of the headers, FBF Sil Moto exhausts, and a power commander, I saw a 13HP increase on my bike. My 2001 now puts out 127HP at the rear wheel with a peak 58 ft-lbs of torque. Not shabby.
You can check it out here (dynos and everything): http://www.buzzwordenabled.c om/mv
-- detansinn (firstname.lastname@example.org), September 17, 2003.