My 01 L is scheduled to go in the muffler shop on friday to remove the stock muffler and have duel flowmasters installed. I have read some posts from the forum that indicate the flowmasters flow too freely resulting in a loss in HP. Is anyone on this forum running the flowmaster and what have you seen in regards to hp loss/gain?

Thanks,

01 Lightning (RED) #2541

'70 Mustang Boss 302 (Grabber Orange)

 

I have tried many different flowmaster setups and none of them really work well most of them result in loss of low end torque then i finally got smart and ordered the bassani cat back W/ high flow cats ( well worth the money ) no exhaust really makes any power for your truck unless you do some mods. then you will see and hear the difference.