mufflers or no mufflers??

Hooking up the exhaust on my Cuda killed alot of the performance. I didn't run it at the track before so I can't say how much it lost but the seat of the pants feel says it was quite a bit. I noticed your not only running stock manifolds but I believe your Sig Erson cam is a straight duration/lift cam. A cam with more exhaust duration would probably work better with stock manifolds. JMHO