Not Ranked
Personally, I don't think you gain anything with a 3" flowpath muffler unless your engine is putting out over 480 or so HP. You can lose flow velocity on a gas engine when the exhaust system diameter is too large - opposite is generally true with a diesel. Any other V-8 Cobra system 2.5" should be optimum diameter.
Also, statistically probably 97% of all the Cobrapacks I build & sell are with packing material to absorb the sound. All the 3" core mufflers are going to be loud & deep, but with packing will absorb dBA's & not hurt the flow any. The packing will definitely help soften the noise some.
|