I'm running a Shuttleworth diesel muffler installed by Orange Muffler aka Defiant Products in Orange County. Zero drone,but slightly louder than stock. I do have a std. cab. which minimizes exhaust due to no back seat. Other than that,the exhaust is stock. Killer.

 

Theres 16 to choose from. How did ya'll pick one?
The two part#s a few of you have flow quite a bit different #s.

Part# Exhaust flows[/U]

5.00 127 9.00 229 26.50 673 M090595 2478 2023 1431
5.00 127 9.00 229 51.00 1295 M090074 2887 2357 1667
5.00 127 9.00 229 51.00 1295 M090535 3260 3100 2340
5.00 127 10.00 254 51.00 1295 M100944 2950 2494 1765
5.00 127 10.00 254 51.00 1295 M100582 1600 1435 1015
5.00 127 10.00 254 51.00 1295 M1011594 1650 1465 1035
5.00 127 10.00 254 51.00 1295 M1011823 1650 1465 1035
5.00 127 10.00 254 51.00 1295 M100580 2530 2215 1565
5.00 127 10.00 254 51.00 1295 M100465 2790 2277 1610
5.00 127 10.00 254 51.00 1295 M1011584 2625 2305 1630
5.00 127 10.00 254 51.00 1295 M1011813 2625 2305 1630
5.00 127 10.00 254 51.00 1295 M100463 3260 3100 2340
5.00 127 10.00 254 53.00 1346 M101263 2530 2215 1565
5.00 127 10.00 254 66.50 1689 M100807 2610 2131 1507
5.00 127 11.00 279 57.00 1448 M110849 2950 2505 1775
5.00 127 11.81 301 34.00 864 M120747 3100 2450 1762

 

I believe that this is the most widely used muffler, part #M090535

Correct me if I'm wrong...

 

I have both the D-51" at back and a Magnaflow 14" up front (both straight-though types) on a 4" system and it is nice & quiet, but still has a good tone to it, flows fine for the power level a stock turbo can run at. Actually, hear more noise from the engine than the exhaust. No Drone at all towing - Love it.

 

Throw a 2nd gen exhaust manifold on there.

 

I have the 40 or 41" Donaldson & I like it. It was a good fit & no drone unless I'm towing 10K lb or more & I'm WOT. Other than that, no drone during normal driving loaded or unloaded. I do have my cat still.

 

i need a 30" donaldson... anyone know of one?

 

My buddy wrapped his down pipe do under the pass floorboard with exhaust (header) wrap. he said it made a big diffrence in drone

 

Interesting. I installed a 5' cat delete MagnaFlow system and it's louder than hell towing. I might try the wrap.

 

I've sold a few of these. I have one on my truck. Quiet untill the windows are down.

 

Where did you mount the muffler? Do you still have the cat?

 

Look into the Hushpower muffler before you make your decision on which muffler to buy.

http://hushpower.com/

Scott

 

One thing I've heard from several people is that they installed the 98-02 exhaust manifold on their 3rd gens and it took away the raspiness from the exhaust and made the exhaust sound like a 2nd gen instead of the 3rd gen. Also, I've got a hushpower muffler on my rig and it really knocked the noise down. Even quieter than the diamond eye muffler I had on it. I'm running 5" pipe with a 62/71/13ss turbo.

 

Hushpower is the answer.... Pricey but works and the world will enjoy it at the same time