Is there any increase in sound in the interior of the car... I am planning to do one at the start of February

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Current Garage
2008 Mercedes GL320 CDI 188k mi Repair/Work in progress
1994 S350 160k mi Garage Queen & prepping for repairs
2005 E320 CDI 203k mi Healthy & Daily Driver
1994 S350 357k mi Retried as parts car
1984 300TD 214k mi Blown OM617 Poss OM603 Swap??

Sold
1987 300SDL 200K+
1994 S320 181K mi
2008 E320 Bluetec 127k mi
1999 S420 130K mi
1980 240D 360k mi
15+ Others that has come, stay and gone

GONE, BUT NOT FORGOTTEN
1995 E320 SE 220k mi
1984 300SD 350k mi

I have one....it allows you to hear a little more of the "low tones" when accelerating......but its not much. Most of the noise goes out the back. I'd say interior noise is about a 5-10% increase (if that) and rear-of-car noise increase is about 80%. I like it though. And off the line power is improved, and general throttle response is improved, since the turbo can spool up almost immediately.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Mine has a straight pipe all the way back as well. I love it! It sounds like a baby Cummins

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1981 300 SD 213k miles "Stock for now"
1999 Super Duty 7.3L 113k miles
1981 300 SD 180k miles "Heavily modified" SOLD

I've got a 1980 300SD & I straight piped it 6 mo. ago. it was like pulling a plug out of it. it was original muffler had mercedes logo on it.it was heavy. the car runs so much better now! the noise increase inside the car is not noticable. but it runs soooo much better! I'm thinking in the future of going to 3" pipe from the turbo to the rear bumper!

How far back is your pipe???, do you guys angle the pipe to blow the exhaust on the ground or straight out...

__________________
Current Garage
2008 Mercedes GL320 CDI 188k mi Repair/Work in progress
1994 S350 160k mi Garage Queen & prepping for repairs
2005 E320 CDI 203k mi Healthy & Daily Driver
1994 S350 357k mi Retried as parts car
1984 300TD 214k mi Blown OM617 Poss OM603 Swap??

Sold
1987 300SDL 200K+
1994 S320 181K mi
2008 E320 Bluetec 127k mi
1999 S420 130K mi
1980 240D 360k mi
15+ Others that has come, stay and gone

GONE, BUT NOT FORGOTTEN
1995 E320 SE 220k mi
1984 300SD 350k mi

I did,but now I've grown up.I'll add a glasspack soon.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Straight out with a slight downward angle....it ends about 2cm inward from the bumper. Maybe a 15 degree downward angle. Lets me shoot soot clouds straight out the back! And, the sound is better when its aimed that way. I should take some video of mine....


A 3" pipe is not necessary, 2.5" is more than enough for what a 617 can flow. I went with 2.5

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Baby cummins ftw! 3" sounds even better.

It does probably echo more in the pipe since its bigger....ok, 3" is fine too, I'd like it if it had more of a rumble. My favorite part is that you can hear the turbo at idle once its warmed up....and when you shut it down you can hear it whistle to a stop. Reving and letting off the throttle causes a "shhh....whistle" sound.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Mine is 2.5" all the way back. It comes out perpendicular to doors right behind the rear drivers wheel. When I first took it off I noticed I got some smoke under acceleration. If it don't blow black, take it back! Thats all I'm sayin'!

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1981 300 SD 213k miles "Stock for now"
1999 Super Duty 7.3L 113k miles
1981 300 SD 180k miles "Heavily modified" SOLD

The muffler fell off the wagon last summer and the difference in the sound was minimal. I had a muffler shop weld it back together and the knuckle-head didn't get it straight and it rattled. I wish I would have him weld it up without the muffler. The truck has a
5" pipe. vrooooooooom What are the legalities of running without a muffler?

__________________
Brad
1981 300TD - daily driver
1963 Chevy II
2001 F-250 7.3 Power Stroke

Its legal to jake brake in our city, so this means straight pipe is legal too ...

__________________
Current Garage
2008 Mercedes GL320 CDI 188k mi Repair/Work in progress
1994 S350 160k mi Garage Queen & prepping for repairs
2005 E320 CDI 203k mi Healthy & Daily Driver
1994 S350 357k mi Retried as parts car
1984 300TD 214k mi Blown OM617 Poss OM603 Swap??

Sold
1987 300SDL 200K+
1994 S320 181K mi
2008 E320 Bluetec 127k mi
1999 S420 130K mi
1980 240D 360k mi
15+ Others that has come, stay and gone

GONE, BUT NOT FORGOTTEN
1995 E320 SE 220k mi
1984 300SD 350k mi

I've heard PawoSD's from the outside, think it sounds nice (and I'm not a loud-exhaust guy). I don't know if it gets obnoxious at full-chat, but normal driving away sounded refined enough to be just sporty.

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Gone to the dark side

- Jeff

My 1979 300SD didn't have any exhaust on it when I got it. It was surprisingly quiet, but left the underside of the car and engine compartment full of soot.