exhaust & porting

[Sh0ckA33]

hmmm what should i do... buy a stock gst exhaust or an aftermarket one? somewhere i read that the stock gst exhausts are good enough....??

and can someone explain what exactly boring/porting of the head would do for me... since the tech section on this site isnt helping me. And, where to go to get it done?

 

[Thomas91169]

get a 2.5" exhaust made at a local muffler shop.

you bore out cylinder walls, but you port heads. porting heads allows for more efficient airflow, so youll make a little bit of power. dont expect huge gains though.