the dynos they post are unrealistic not to mention thats a dyno sheet from a HD truck. which the free flow muffler will not hinder the compression because it is boosted

 

heres one for 90% of the trucks on here

but still look at the dyno.... the trucks HP and tq dont spike that high on any truck... the engine is not designed to...i was unable to find a dyno sheet for a flowmaster muddler off of their website...

 

No local shp is going to custom bend 2.5" tailpipes to match what the R&D at Magnaflow has already done. Local guys don't test their work, exhaust manufacturers do. My advise is to keep his current suystem, not spend any money.


FYI: #15609, $360 shipped.

 

Be wary of any claims measured in flywheel hp. Putting the power to the ground is what matters.