White Brothers MX4 slip on.

[Lhaitzss]

Has anybody used this slip on? If so how did it perform for just a slip on? Also I noticed it does not have a spark arrestor, and is designed for closed course racing. Does this include all racing or only certain closed course racing? Also is it a required item for an exhaust? Thanks.

[450ss]

well i have seen them on 450r s and they are suppose to be one of the best but just about any slip on is gonna give you what your looking for and they are not to loud either they have adjustable pressure plates so you can tune the exhaust for more low end or more top end also midrange so yup its pretty good