[mkcobra]

Jack21

this sound more consistant with the weak flow, and quick powerband, little in or little out. Don say the pipes only cost about 50hp if you take that off of the 419 or 400hp motor still should be 350, with drive trainloss still should make like 300hp at the rear wheels. I may consider disconnecting the pipes at the header just to see the increase. Jack is see you to have a CR 351 , did you get to Dyno yours and what kind of HP are you making.

Don can you comment on some simple bolt on replacements for what i have, these seem loud already not sure of the exact info on this pipe but sound good an look nice, how can i tell what size mufflers are in this sidepipes.