Im gonna have the cobra fi2000 installed on my 2006 c90t to go with the hard krome pipes, hopefully this will stop the backfiring , anyone with a similar problem ??????

 

I installed one ao a 2006 c50t myself with trouble, have had no backfire problems using Cobra pipes.

 

If you plug off the pair valve, or remove it, and then block off at the cylinders- with a kit that you can buy. or make youy own its not hard to do. If you look at the kit, you can see that it is easy to make your own.

 

Sorry the pair valve is what i have hear that is causing the back fire problem.