I was noticing on www.on-dunes.com they have 2 diff. filters for the ds650. the normal replacement filter and then the direct carb mount. the direct mount is about $6.00 cheaper so why wouldn't you buy that one. I know you have to buy the pre-filter $15.30. I would think you would get more hp out of the direct mount. Also will I have to rejet if I install the direct mount. Thanks

 

Check out the threads where mr hp dyno tested that set up or go to http://www.hpresearch.net/

The results say otherwise