Budakane

Does any1 know what the CFM is on a 06-08 hemi 1500 stock exhaust is?

FrostKing

Exactly the same as the engine it's attached to. There is no answer so you need to re-word this.

Budakane

basically I want to change out my muffler, iwant more poewr so I wanted to know the cfm flow rate on the stock setup, the muffs I have now are at like 470, and I am trying to figure is that a signifigant diff in stock enuff to keep or should I upgrade

Budakane

Bump!! Looking back on my original question it doesn't make much sense. Doing research I found that the CFM/exhaust flow rate for 3in straight pipe is 598. Building a performance rig you want as much flow as possible, so the closer to 598 the better. My muffler has a cfm of 470, but noticed noone has the flow rate for stock exhaust systems. I am leaning towards s muffler swap...I feel its my weakest link. I have longtubes, 3in ORY, and 3in custom piping dumping at the axle. Does any have an answer to my question or a alternative to my 3in Cherry Bomb Pro muffler? Thanks

FlowmasterMufflers

CFM is measured using a flow bench. A flow bench produces a steady, low temperature stream of air and lacks the acoustical and thermal dynamics that are produced by an internal combustion engine. For that reason a CFM rating isn't much of an indicator of muffler performance.