How would you rate the power increases (Flow) for each catback? How do these numbers look? Anywhere close?

Stock 0HP
Loudmouth 12HP
corsa 8HP
borla 8HP
hooker 8HP
Flowmaster 5HP


I have a Crapmaster 80 series muffler and would like to switch over to the Hooker catback. Is it a more free-flowing than the flowmaster 80? In other-words, should I switch? I dont want a loudmouth on my 'vert with longtubes and no cats so I'll sacrifice a few ponies there.

 

Hmm.. I'll bet you'll find most of the catbacks make around a 10hp difference. Best to choose a catback based on the sound you want... 2hp difference isn't worth a sound you hate.