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Old 16-04-09, 12:20
NickW909 NickW909 is offline
XT-Moto SuperStar
 
Join Date: Jan 2008
Location: West Midlands
Posts: 272
NickW909 is on a distinguished road
I'm by no means an expert, but I'll have a stab at this one.......


1, Makes the engine flow better (normally combined with air filter/fuelling mods) = a little more HP

2, Reduce weight

3, Nicer/louder sound




Nick.