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I'm in the process of installing the Capristo valved exhaust on my 2014 SL65. Mufflers are the easy part. Locating places for the control module and control valves and wiring them up is the challenge. Install is bolt-on
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
I recently got the AMG cluster and transmission mods. The tranny mod added Agility mode and remember last setting. The AMG cluster mod is cool with the new info about the car and the tranny mod adds a whole new dimension to tranny responsiveness for non-AMG cars.
AMG cluster option for non-AMG cars. Manual mode now shows available and selected gears.
Capristo exhaust install is done and working! Mufflers were a cinch to install, but control system was another story. Took a while to decide locations for the control box and solenoid valves and then to route wiring and vacuum hoses. In the end I'm happy with the locations and routing I chose. The control box is on the right wall of the trunk near the stereo amp. The two solenoid valves are each located above the exhaust tip for the muffler they control. Photos attached.
I'll post some audio soon...
Control box Solenoid valve mounted on trim above the exhaust tip. Closer view of the solenoid valve mounting.
Capristo is an "active" exhaust. The controller senses backpressure at the muffler and will open the flaps at one of two pre-set thresholds, or you can just keep the flaps open. The "Cruise" pre-set opens at a higher threshold than the "Sport" threshold. Pre-sets are controlled by a wireless fob.
The flaps operate using engine vacuum. On a cold start the vacuum requires a few seconds to build up, so what you hear at start is with the flaps open. Then, as vacuum comes up, the flaps slowly close (pre-set was on "Sport") and sound gets quieter. With flaps closed the sound is similar to the stock mufflers, which is what I wanted.
R231 M279 SL65 AMG; '70 Cuda B convertible; FJR1300; CBX1000, GPz1100, GS1100ES ('Busa)...
catless downpipes same for SL63/SL65 AMG?
I am looking for compatibility to models that I can potentially use as an option for catless downpipes for my R231 SL65.
Is the SL63 oe turbo exhaust downpipe flange 70mm - which is what is on my SL65?
I am looking for compatibility to models that I can potentially use as an option for catless downpipes for my R231 SL65.
Is the SL63 oe turbo exhaust downpipe flange 70mm - which is what is on my SL65?
Thanks
pressertech custom makes those i believe
however mind the gas smell, might consider high flow cats. i see no real benefit other than top end gains for the price.
R231 M279 SL65 AMG; '70 Cuda B convertible; FJR1300; CBX1000, GPz1100, GS1100ES ('Busa)...
Thanks for the reference, however, I am well aware of the very limited offerings for my model. I am not looking to spend ludicrous money on custom anything - I have better things to spend my hard earned money on.
As I stated, I am looking for compatibility of turbo flange sizing for "off the shelf" downpipes for the more readily available SL63 that will be competitively priced.
Not asking for reasons why I should not modify, we obviously have different interests & priorities.
Thanks for the reference, however, I am well aware of the very limited offerings for my model. I am not looking to spend ludicrous money on custom anything - I have better things to spend my hard earned money on.
As I stated, I am looking for compatibility of turbo flange sizing for "off the shelf" downpipes for the more readily available SL63 that will be competitively priced.
Not asking for reasons why I should not modify, we obviously have different interests & priorities.
i never said you “shouldnt” modify , but anyways good luck on your quest
I am looking for compatibility to models that I can potentially use as an option for catless downpipes for my R231 SL65.
Is the SL63 oe turbo exhaust downpipe flange 70mm - which is what is on my SL65?
Thanks
@droptail If you're looking for more sound from the V12 then I suppose downpipes should help. The R231 SL65 has no middle mufflers or resonators to begin with and yet it's fairly quiet. The exhaust I installed has bypass and even with it open the sound is not that loud at lower RPMs. I'm okay with that, but I think it's hard to get a lot of sound out of the V12 for some reason. Probably the turbos muffle a lot of it.
No rub and no fender rolling. Could actually go to a 315 without any rub in the rear - 325 would more than likely require a little massaging.
@ruflife thanks for that great info! I'm badly in need of more rubber in the rear of my SL65. Hard to believe AMG shipped a car with 738 ft lb of torque and only 285 rear tires. I have 295s on mine right now with stock wheels. Looks like you could definitely go to 315s on the back with the 11" wheel.
Since I'll probably go with 315 on the rear, I might want the tire to stick out a bit less and am considering a 46 ET. Do you know how close the rim/tire are to inside components? Could it all move in about 2mm w/o issues? Thanks.
Last edited by jmattioni; 05-20-2024 at 11:32 AM.
Reason: Extra question
12-03-2023, 11:25 AM
