M275 V12 Bi-Turbo Platform Technical discussion relating to models sharing the M275 V12 Bi-Turbo (V12 TT). Including SL600, SL65 AMG, CL600, CL65 AMG, S600, S65 AMG.
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CL65 - Check out my custom intake!

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Old May 1, 2026 | 03:47 PM
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CL65 - Check out my custom intake!

Just finished my custom intake system. Best I've seen in my opinion, but let me know what you guys think. The goal was to make it look as OEM as possible under the engine cover and pick up air in the coldest possible place.








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Old May 2, 2026 | 10:14 PM
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OP have you measured intake air temps before and after?

Did you connect the pair of intake pressure sensors that measure vacuum in the air filter housings to your new air filter arrangement? If so have you been able to measure less restriction?

Sure looks good.
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Old May 3, 2026 | 05:19 PM
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No, didn’t do any of that. Build isn’t that serious. The OEM intake is ridiculously restricted—this really woke the car up
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Old May 4, 2026 | 11:39 PM
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Looks NICE!
Only problem that may come up is the filters waterlogging in the rain and feeding the turbos a lot of water, but we've got weather apps for that lol.
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Old May 5, 2026 | 10:47 AM
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Thanks man! Good thing I don’t drive this thing in the rain haha.

But seriously, the path the water would have to travel is pretty long and has a lot of curves and turns, so the odds of anything like that happening are pretty slim—unless you pointed a fire hose directly at the filters for several minutes and completely flooded the intake tubes. One thing to note: this is exactly where the OEM system picks up air from. The only difference is I have my filters up front instead of right by the turbos on top of the engine.From a physics standpoint, it’s not like water just flows straight through an intake. The filter media is designed to trap particles and also breaks up water into mist. Once that happens, most of it either gets caught in the filter, drains out, or turns into vapor as it moves through several feet of tubing with heat and airflow. You’d need a sustained, high-volume source of water to actually overwhelm the system and push liquid all the way through.

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Old May 5, 2026 | 11:09 AM
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SL65, Raptor SVT, Mustang Cobra SVT, Datsun 510, Mustang Mach-E GTPE, HD-Fat Boy, Triumph Rocket 3
This looks fantastic! Great job and even better post!
I wonder if it is a similar route for the 2009 SL65 R230 chassis?

Would you have a list of the hose bends and parts used and the vendors to purchase them from?
Thanks for posting this.
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Old May 5, 2026 | 11:51 AM
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Originally Posted by GoFastr
This looks fantastic! Great job and even better post!
I wonder if it is a similar route for the 2009 SL65 R230 chassis?

Would you have a list of the hose bends and parts used and the vendors to purchase them from?
Thanks for posting this.
Much appreciated! I don't have a detailed parts list as I had a shop build the system. Shoot me a DM and I'll share their info with you. Here are a few pics of the full system, minus the filters and hose clamps. This design should work in the R230 chassis just the same.

The little black brackets were made to hold the engine cover on since it used to clip in to the factory airbox.




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Old May 5, 2026 | 12:13 PM
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FINALLY someone kicking some *** on a real intake mod! That looks amazing.
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Old May 5, 2026 | 12:26 PM
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Very nice custom fabrication!
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Old May 5, 2026 | 02:54 PM
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Just got the car off the dyno. 580whp and 714wtq on 91 octane. Not bad, if you ask me. Factoring in 15% drivetrain loss, we have 706 HP and 882 TQ. I was hoping to hit 600whp, but im not complaining. I plan to do watermeth next to keep things cooler and hopefully find that 20 wheel HP and TQ.

Mods:
Rentech Upgraded coolant pump
Rentech Second heat exchanger
Weistec ECU and TCU tunes
Custom intake
Catless downpipes
Stock mufflers


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Old May 5, 2026 | 05:38 PM
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Over 700 lb/ft is nuts. In the best way possible.
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