I have thunderheader slip ons and was thinking of going to SE performance slip ons #64924-99 off road use only slash ups. I heard these the other day andthey sounded pretty good alot quiter than the Thunderheaders. Will these take away any power or torque that the thunderheadersare producing, and will these make my bike run hotter? Will I pick up any low end torque? Any help would be appreciated.

 

Well I take it your talking the change for your '05 Road King 88ci...
If you have a PowerCommander or other type of Fuel Management System then you should make the necessary changes in the MAP...
Thunderheaders ARE LOUD and perform well... Run Hotter... Not if you have it set-up right...

 

Hey pappy,
Yea,I'm thinking of going to the SE's because they are quieter. The SE's will run hotter because of the back pressure? I have the remap on the stock ecu for the thunderheaders, do I have to remap again?