27-09-17, 04:46 PM
(27-09-17, 03:17 PM)Falcon 269 link Wrote: Altering the air box lid requires the intake stubs to be gas-flowed as well in order to gain the best results:
http://www.yamahafz1oa.com/forum/showthr...+boot+mods
Having gone back to non-gas-flowed inlet stubs, can't say I noticed any actual difference on the road, so not necessary.