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What's the HP?

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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.

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