I want to quiet down my truck. I have a pretty healthy cammed 6 liter with headers and true 3" duals that end in knock off flowmasters that are equivilent to the american thunder series right before the axle. I absolutly love how it sounds but my neighbors don't. If i get on it in town, you can hear it for an easy half mile radius... The drivers side tube crosses under the tail shaft and both pipes run side by side. There is all kinds of room under there. What I kind of want to do is run a 3" in to 4" out Y pipe then an electric cutout, then the absolute quietest muffler I can get on it still dumping before the rear axle. My questions are: Whats the quietest muffler I can get and would a 3 in 4 out Y pipe be too restrictive? I can't see it being much worse then the chambered mufflers it has on now. Any opinions?

 

magnaflow sells a 3" dual to a 4" might be still too loud. I heard Dynomax's super turbo muffler is quiet.

 

Following! I plan on running a very similar setup, and was hoping to go y 3" into a 4". BTW where are u in KS?

 

Mcpherson

 

On my cammed Tbss I had true duals with x pipe and magnaflow bullets and it was obnoxious so I removed the x pipe and put a 18" long DI/DO magnaflow muffler and that made a HUGE difference and still had the same tone

 

Nobody else?

 

under vehicle dumping will make any exhaust system louder. Run it out the back or sides after the mufflers to quiet it down. Two 3" magnaflow 22" mufflers like the 12589 would flow plenty and be quiet. The 12289 is a 24" and about as quiet as stock.

Heck, most guys are running 5.3L on single 2.75" exhaust. I don't think a single 3.5" or 4" is too restrictive for a N/A 6L.

 

I really like how my exhaust turned out:

TSP long tubes > 3" Y pipe > stepped to 3.5" cutout > NNBS 6.2 3.5" muffler

I think the sound is perfect with the headers and ORY. It is mostly quiet at idle but when you get on it you can definitely hear it. No drone at any RPM whatsoever and I still have the cutout that allows me to run "open headers" at the track, or any other time I want to be loud

 

Baby 210/218 cam < LT < 3" hf cats< 3" xpipe< 3" cutouts < Magnaflow 22" 3" DI/OT with built in xpipe. I thinks it is 12599

It is very very tame and bassy. Smooth light rumble. I used to have super 40s on stock cam/manifolds and it was way louder than this magnaflow with headers and cam.

Keep the duals....they're Kewwwl haha and add an x-pipe with the muffler. It's definitely budget route! I found a coupon and bought it for like $90 through autopartswarehouse or something like that

 

What are the cam specs?