280sl Exhaust Question

[mrfatboy]

I am redoing my exhaust system and have a question regarding the front pipes. See attached picture.  Parts 49-2000,2001. What are the end pieces (closet to muffler)?  Resonators? Straight thru pipe? I am trying to decide if I really need these parts because of that end piece.  They have been previous cut out from a bad muffler job.  

If they are straight thru I can just buy #49-2002 and be done with it.  If they actually are needed I need to spend another $400 to buy them also.

Thanks in advance



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1969 280sl
Signal Red

[Ricardo]

MFB
I believe you are referring to the section of the headpipes where they are joined together just in front of the muffler. This section is a cross flow section where the two pipes are joined to allow some pressure equalization, at least I think that's the intent. Not sure what effect it would have to go without them, perhaps a tendancy to backfire, but even the aftermarket systems have this section in them.
I'm pretty sure this was discussed before, so a search on exhaust systems might turn up a more detailed explaination.
Hope that helps

[mrfatboy]

I just got off the phone with Millers and K&K.  They gave me two different answers. Ricardo, your answer makes 3. I'm a confused.

Millers answer:
The end pieces of the downpipes from manifolds closet to the muffer are resonators.  Both pipes are also sold separately.

K&K answer:
The end pieces of the downpipes from manifolds closet to the muffer are just couplers.  Both pipes are welded together and sold as one.  Since the end pieces are couplers I can just weld extra pipe to make the connection from the down pipes and middle muffler (resonator)

Ricardo's answer:
The down pipes are connected and have some sort of cross flow between them.


I done a search but could not find anything.  I will look again but does anybody know the correct answer?

thanks


1969 280sl
Signal Red

[mrfatboy]

I just got off the phone with Kevin at Miller's East. His answer jives with K&K.  If this is the correct answer I should be able to forgo buying new down pipes and just beable to scab in extra lenght of pipe to connect to the new resonator.

Also, Millers' East confirms that part #49-2000 & 49-2001 are for 2 different model cars.  Miller's West wanted to sell me both

Can anybody confirm before I buy.

thanks.


Millers East answer:

The end pieces of the downpipes from manifolds closet to the muffer are just couplers. Both pipes are welded together and sold as one. Since the end pieces are couplers I can just weld extra pipe to make the connection from the down pipes and middle muffler (resonator)

1969 280sl
Signal Red

[George Des]

I think what is reflected here by the 2 different numbers is that there is an early and late version of the head pipe assembly. Early 230SL's, only,--I don't know the cut-off- used this early version of the headpipe. As I recall these connect to the sheet steel exhaust headers instead of the cast as found on the later 230Sls and the 250/280 models. Hope this helps.

George Des

[mrfatboy]

thanks. i just got confirmation. that the end of the pipes are just coupler that are welded.  I can just buy a new resonator and splice in some pipe to make the connection.

1969 280sl
Signal Red

[Benz Dr.]

No, they're welded together as one piece just in front of the center muffler. There are two different ones used but everything after about the first 14,000 cars built is for cast iron header pipes.
There is no cross flow between the pipes.

Dan Caron's
 SL Barn
benzbarn@ebtech.net
 slbarn.mbz.org
  1 877 661 6061

[66andBlue]

While trying to isolate a noise problem when driving over potholes I noticed that I am missing a rubber buffer (#22 in the picture).
My question to the experts: how does one attach the buffer? As shown in the pic, knob up pressed into the hole in the frame or down, wedged between the claws?
Further problem is that I don't have that claw on top of the exhaust pipe just a flat metal piece.
Thanks!




Alfred
1966 blue 230SL automatic

[bpossel]

Hi Alfred,
The rubber buffer's nipple sticks into the upper hole of the rear.  Need to unhook the rear tail, muffler, and drop it a bit to gain access.  Use some silicon spray and carefully turn the rubber until the nipple pops in.
Bob

quote:Originally posted by 66andBlue

While trying to isolate a noise problem when driving over potholes I noticed that I am missing a rubber buffer (#22 in the picture).
My question to the experts: how does one attach the buffer? As shown in the pic, knob up pressed into the hole in the frame or down, wedged between the claws?
Further problem is that I don't have that claw on top of the exhaust pipe just a flat metal piece.
Thanks!




Alfred
1966 blue 230SL automatic

bpossel  (Memphis, TN.)
'71 280SL  /  '97 E320

[66andBlue]

Thanks Bob!
I am waiting for the buffer to arrive and will report back.

Alfred
1966 blue 230SL automatic

[ja17]

Hello Alfred,

When the exhaust is hung correctly, the rubber bumper will rest against the metal box channel above.

Joe Alexander
Blacklick, Ohio