SL-Class (R231) 2013 on: Discussion on the SL550

SL/R231: Stock Exhaust

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Old Oct 21, 2024 | 04:47 PM
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Stock Exhaust

Not sure how many SL owners have been under their cars, but I thought I would share a pic of my exhaust system.

First, the pipes are huge. I should have put a caliper on them, but I'm guessing 2.75" or 3". The second thing is that there are two crossover pipes (red arrows) that help balance the exhaust pressure, reduce in-cabin drone, and increase engine output. Not bad for a stock exhaust.


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Old Oct 21, 2024 | 04:48 PM
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Closeup of the crossover up front.


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Old Oct 22, 2024 | 09:36 AM
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O.D. is actually 65mm or 2½". Tried to get a better look at the front "crossover" because I'm thinking it may only be for support and not an actual crossover pipe. But the car is too low to get a good look. The rear one is clearly a crossover by the way it is formed.
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Old Oct 22, 2024 | 10:07 PM
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right one is stock for sl550. from engine towards on each pipe is cats, the resonator, h pipe 1st muffler, and 2nd muffler. thats about it.

2.5 inch on sl550 3 inches and a different setup on sl63

Last edited by toi; Oct 22, 2024 at 11:47 PM.
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Old Oct 23, 2024 | 07:09 PM
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Originally Posted by JettaRed
O.D. is actually 65mm or 2½". Tried to get a better look at the front "crossover" because I'm thinking it may only be for support and not an actual crossover pipe. But the car is too low to get a good look. The rear one is clearly a crossover by the way it is formed.
I put mine on a friend's lift once a year to change the oil. I'll have to check out the exhaust system next time. I also plan to change out the brake fluid at the same time.
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