[Arnold K.]

I wasn't aware that carbon buildup was such an issue on N54s, until I recently saw Real Auto do a carbon cleaning on the manifold of a forum member's BMW 335i Coupe, and I couldn't believe how much crap was built up there - no different than what S4s and RS4s notoriously see. The owner of the car later told me what a huge difference the car made, brought back a lot of the power and umph it's lost over time - I got a feel for it myself later on and it's true, the car simply feels faster, no other way to put it. So I encourage all of you N54 owners to get this done if your car has more than 40K miles on it. Believe me, the results are well worth the cost.

https://www.facebook.com/realautodynamics
1-(516) 442-7155

Also, if you go sometime soon, you'll see a 1000WHP Nissan GTR the shop just pieced together and fired up for the first time on Saturday. I happened to be there, and it sounded ridiculous! It's got a 4.2L V6 stroker motor + bigger turbos transplanted in place of the OEM turbos and motor. There's a quick video of it in the link above. Sorry, I know...kinda random, I was just seriously impressed with this thing's potential and mechanics.

But yeah, carbon cleaning. Do it.

[f30er]

Hey guys, this was my car they did the cleaning on. Made a complete difference! I'll see if I can get some pics from that day for before/afters but my car has 96k miles on it and I've been running tunes since break-in. Car feels "young" again!!!

[JJFESQ]

Walnut blasting ?

[SS e93]

Cost? I am at 35k. Thinking about getting this done. Rarely go WOT, and never ran a tune though.

[tofu-]

$$?

[AceBMW]

pm the cost, i'll consider it.

[M3 2ENVY]

Im getting my carbon cleaning done by them tomorrow, i will post my before and after pics and let you guys know how the car feels and yes they are doing "walnut blasting"

[Arnold K.]

Thanks for coming through 2mchbst.

I cannot PM anyone a price, since I don't work at RAD. But do definitely give them a call, because when they're done with your car, it will come out spotless. To borrow 2mchbst's pics:

Before:


After:


Notice in the before pic the thick layer of gunk lining the wall of the intake port? All gone, and the ports inside are spotless too.