What's the HP?

Hi ya'll, what's the HP on a '03 450 with a procircut type 496 full exhaust? Or just the stock HP on the 450?

Hi ya'll, what's the HP on a '03 450 with a procircut type 496 full exhaust? Or just the stock HP on the 450?

Most tests I've seen put the output of an '03 at around 47-48 stock (tuned and jetted). Most good aftermarket exhausts add .5-1.5 hp to that. The stock exhaust is very good, actually. The biggest increase I've seen was nearly 2 hp, but that pipe was very focused on peak power, and was weaker than stock by a small amount through most of the rest of the curve.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now