03-01-2007, 09:45pm
depends on the dyno.On a dynojet 250i stock runs 155 average and high 160,s to low 170,s with airbox,full system mapped and is a fair bit lighter.They pick up about 12-15hp for the above mods.The throttle feels different with a 4 into 1, a touch softer under 3000rpm.Can,t vouch for a tre yet. Glenn the Spa Man<i></i>