UK customers - please note this silencer is not road legal in the UK and will be marked Not for Road Use Exhaust Downpipes Fits: Yamaha YZF-R1 YZFR1 1998-1999 4XV Yamaha YZF-R1 YZFR1 2000-2001 5JJ - Replacement stainless steel exhaust header pipes to fit your Yamaha YZF R1 - This is a hybrid of a race system and road exhaust, allowing you to ditch the cumbersome Exup valve and servo. - This system weighs an astonishing 3.6 kgs compared to 6.4kgs for the standard. - No re-jetting or modification needed, as long as your bike is set up as standard. - This will accept your standard road legal Yamaha end can or any aftermarket silencer designed for your R1 including our own Black Widow Silencers. - Four engine port gaskets included. - 2 Year Unlimited.
