This is the company that originally did Apten's porting and invented it before Apten moved to Cincinatti. Only $395 for the porting job, check it out:
http://www.stiegemeier.com
I'm getting this done, and so is a friend. Something to really think about, it makes your blower more efficient. You will see gains with a pulley/tune only.
http://www.stiegemeier.com
I'm getting this done, and so is a friend. Something to really think about, it makes your blower more efficient. You will see gains with a pulley/tune only.