The front head is worth it if you're racing and want every last ounce of power, but for the road not really - the plugs are damn expensive for a start!

My pipes sound awesome, the crackle you can hear through the chambers is pukka GP bike. (when they were proper GP bikes!)

That and the rort of the airbox is a heady noise mixture indeed...

Go on, tell 'em how good it sounded Monkey!
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball