Not really, because the aftermarket system is designed just like your stock system.
Now I am sure someone will jump in and say different, but having been in the racing business for over 50 years and won a ton of races and built many a race and stock engine, I feel I kinda know what I am talking about.

Now if you want to build a totally new exhaust system designed to make more HP that can be done, but we are talking about $5000 or more thousand dollars for a custom system.

Do you think that you pick up much in HP if go aftermarket?
cheers
Robert[/quote]