The DR.D NS-4 is the exhaust chosen by more magazine test riders than any other. Those who can ride with any exhaust they want, choose DR.D exhausts. Uniquely track tested to improve hit, provide a smooth delivery and great top end power with substantial horsepower gains throughout. The DR.D NS-4 will reduce weight over the stock exhaust system. The NS-4 features welded construction, a magnesium End Cap, removable bolts (not rivets) at the inlet cap for easy repacking and stepped perforated core (reduced heat) for increased durability set the NS-4 apart in construction quality.
Performance gains throughout the powerband
Lightweight magnesium end cap is riveted on for increased durability
Welded construction helps reduces weight throught
Includes roll-style packing that extends the packing life
Slip-On exhaust systems do not include headers
All Titanium and Aluminum systems come with a Spark Arrestor Screen
All Carbon Fiber Systems do not come with or accept a spark arrestor screen and are for closed course race tracks only.
