Is anyone running the ESR Pro Series Thumper pipe and air box eliminator kit? If so how does it perform? I know their 2 stroke pipes are great, had one on my 250R.

 

I have one on an 05 Z400 & it makes great power. If you order one make sure you tell them you want the spark arrester too. It is a little loud though so if noise restrictions are an issue where you ride be sure to consider that. Ray.

 

Ray, Do you run their airbox eliminator kits also?

 

Yes but with an FCR carb not the stock carb. Ray.