What a difference, I could only hit 3500 revving it up now I can hit 5k. Guess my stock spring badly needed replaced. I felt like I just put some new stickers on and gained 10hp 
A must do cheap mod, that everyone should do hands down.
What a difference, I could only hit 3500 revving it up now I can hit 5k. Guess my stock spring badly needed replaced. I felt like I just put some new stickers on and gained 10hp 

I put the filter in after I drove around with the new spring.

