Apprx. how many MPH can one expect to gain with these mods:

- Top end oriented pipe (ie. white bros. e-series, ids2)
- Jet Kit
- K&N Filter, no air box lid

What alone will a 14 tooth countershaft sprocket add?

I would like to gain 8 more MPH, and bring the top speed of my 300ex to 60, is this possible with these mods?

Thanks

 

those are the exact mods you need for 60+ mph. 14 tooth sprocket on the add is a good addition Im considering.
Im also getting RaZrs on the rears for a better ride and to grip the surface better.

 

you could do 60+ stock, but you would have to go dowwn a pretty steep hill