SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: RENNtech is Back for the R129!

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Old Apr 30, 2026 | 11:21 AM
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From: Lutz, FL
1997 MB SL600
RENNtech is Back for the R129!

I just got an email from the fine folks at RENNtech and they are offering some of their past upgrades for both the V8 and V12 R129 cars.

Now the folks that missed out can party like it's 1999!

https://store.renntechmercedes.com/c...-129-1990-2002

I didn't see the resonator eliminator, but everything else seems to be there, even the heim joint suspension stuff (which I recommend).

Party on.
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Old May 1, 2026 | 07:05 AM
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G63, GLE 300d, SL500 (R129), 560SEC, 560SEL AMG 6.0, SL600 AMG Japan (R129 440HP)
This spring I bought that renntech resonator eliminator as NOS from a friend. It rocks !!!
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Old May 1, 2026 | 01:00 PM
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G63, GLE 300d, SL500 (R129), 560SEC, 560SEL AMG 6.0, SL600 AMG Japan (R129 440HP)



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Old May 1, 2026 | 11:07 PM
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It works better if you put it in the car.

I got this from Japan.
I got this from Japan.


You can sort of see the resonator eliminator through the heim joints.  It's the shiny thing.
You can sort of see the resonator eliminator through the heim joints. It's the shiny thing.
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Old May 2, 2026 | 01:34 AM
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G63, GLE 300d, SL500 (R129), 560SEC, 560SEL AMG 6.0, SL600 AMG Japan (R129 440HP)
I know I already have it installed in SL600.
I also have AMG muffler. The same set that’s on your first photo.

Last edited by kamil.kniczek; May 2, 2026 at 01:36 AM.
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Old May 2, 2026 | 10:54 AM
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I hope some R129 folks here take advantage of this opportunity to use the RENNtech upgrades.

I couldn't help but notice that the current prices for the parts are the SAME prices as back in the day.
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Old May 2, 2026 | 01:17 PM
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G63, GLE 300d, SL500 (R129), 560SEC, 560SEL AMG 6.0, SL600 AMG Japan (R129 440HP)
do you guys think that ECU mod for M113 is worth the money? +23HP for $ 2k....?

Last edited by kamil.kniczek; May 2, 2026 at 01:22 PM.
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Old May 5, 2026 | 12:09 AM
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Only you can answer that price for performance question.

$2K to me might not mean the same thing to you.
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