1) Yes
These are built in house and can be made to custom length.Personally the 30" work nice,but I think 40" would be just a hair better @ WOT.
2) The Loss of back Pressure thing was and still is a rumor.Where is there proof ? I haven't seen a dyno sheet proving 3" exhaust being detrimental to these 5.7 Platforms.The overall OD is 3" but the flow path is 2.25"
I have 2.5" tail pipes
3)There is abit of a "bark" on cold start thats last for a few seconds then chills to a nice rumble.I always allow my vehicles to idle several minutes on a cold start before driving(even in warm weather) so I'm well clear of the neighbors before I can get to 30 mph.I dont make half the noise the Cummings/Duramax's do when leaving the neighborhood.
You control the noise level,under 1500 rpm they just rumble,listen to my first clip again(one with the speedo). The 0-50 will give you an idea what its like for daily city levels.
I cant stand obnoxious exhaust either,but these mufflers have the ability to BE LOOKED AT !
But its something that can be controlled,40 Series Flows are always loud and only get louder when their leaned on
Quote:
Originally Posted by dbarnett66
Negra
As always, this forum is the best for information. I do have some questions for you.
1. You bought the 30" long version. Does longer version equate to a more quiet muffler?
2. I thought that you needed to match the 2.25 inch exhaust on the stock muffler. On your setup, I noticed that you used a 2.25 in and a 3" out. Won't you lose back pressure and lose some torque?
3. Is this exhaust going to wake the hood when I leave in the morning, or is it mild enough for the daily driving routine? I want louder than stock but not obnoxious "look at me" sound.
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