Which csl airbox to buy?

[Thrifty S50]

+1 for Haimus. Nothing against Karb boxes, seen a few in person and they are amazing pieces as well, But I bought my airbox during the pandemic (peak pandemic) and they were 6+ months out from fulfilling orders back when I checked. Ive had 2 airboxes actually and The Haimus has been nothing but great to me. Excellent finish, even the Karb guys think its one of their own Communication with Haimus is easy through Instagram. Plus I love the updated IAT location; my 1st airbox was a replica of OEM from Poland which had the OG IAT location near the OFH. Id lose power when pushing it as the OFH temp would throw it off.

Oh, and the 5 year warranty doesn't hurt














I also have been trying make videos capturing the essence of the CSL intake sound. IMO its probably one of the best sounds a car has made, ever. But its a very difficult sound to capture accurately. Here I put a shotgun mic directly to the plenum, which sounds great, but im working on another video with in cabin audio, and flybys (while upholding the same level of audio fidelity). It is worth nothing that this is Haimus's "motorsport" box which has 1 fewer layers of clear coat. While a miniscule detail, overall carbon wall thickness is critical to the pitch of the induction it will ultimately create, and was a common source of R&D for Die Wethje Carbon GmBH when they manufactured the intake plenums for the McLaren F1 and the M3 CSL intake.

[r4dr]

My friend Good has the exact same setup as you, with a Karb box, it's awesome. He's adding the HJS catted sect 1 now, I assume you already have that. You did well to get the resonated sect 2 imo, makes a big difference.

Forgot that part, yes it's a catted section 1. No more stink.

[Tbonem3]

My friend Good has the exact same setup as you, with a Karb box, it's awesome. He's adding the HJS catted sect 1 now, I assume you already have that. You did well to get the resonated sect 2 imo, makes a big difference.

[r4dr]

+1 on this, the man knows what he is talking about. Those on the fence, i'm in SoCal, can let you try it to get an idea of real world sound, quiet exhaust and loud airbox/headers is definitely the way to go.

I just put an oversized SS headers + S1 + resonated S2 on my coupe with a stock muffler. Having never driven a stock muffler car before, this is my favorite setup yet. I can't wait to put a Karbonius race box on the motor.

[Tbonem3]

I'm now back in vert owners' good graces 😄

[siamkazi]

In my experience, the slower (less powerful engine and/or less power mechanically sent to the wheels) car with CSL airbox makes a better sound. I can't say louder, but to me, better. I think it's due to being a slower sound.

Try this experiment. Go WOT uphill, then go WOT downhill and see which sounds better. When I did 4.10s, my CSL airbox sounded worse to me. So, in my experience, the more load you put on the engine, and the slower you move through the powerband, the better sounding the CSL induction.

I think the best CSL induction you could ever make would be to take a healthy vert and only do the airbox conversion and headers. And then just rip through the canyon walls.

+1 on this, the man knows what he is talking about. Those on the fence, i'm in SoCal, can let you try it to get an idea of real world sound, quiet exhaust and loud airbox/headers is definitely the way to go.

[Sprp85]

Well, I believe now is the time to order Karb boxes as Euro hit parity with USD.

Basically, you can get Karb delivered to you for about $1900.

[discoelk]

Does anyone have any thoughts/opinions or pros/cons on the Karbonius race box vs "standard" CSL box? I don't care about running the flap but I'm curious if the air ducting from the kidney grills would contribute to lower IATs?

I'd pair the standard box with their carbon funnel or a 3d printed funnel like the oe flap but sans flap.

[Gearhead55]

for what its worth, Haimus frozen carbon (scroll through to get to the video clip):

https://www.instagram.com/p/CdcJ-FQL..._web_copy_link

[NZ_M3]

Maybe my expectations are unrealistic and/or I have defective ears. It sounds great from the outside and inside with the windows down, but it’s kinda underwhelming with windows up. I was watching the Harry’s Garage manual CSL vid recently, and it seemed like that car sounded a bit different than my car. My intake is the only one I’ve experienced in person so far, so I could totally be wrong. I mean, the dB reader a few yards from the dyno read 116 dB..def loud. I don’t think it makes much of a difference, but I have the Karb/ITG foam filter.

NZ_M3 Hi, pls help

The Karbonius sounds different to the Genuine CSL one. I've heard them back to back on the dyno and I can tell the difference. One actually has a slightly higher frequency - I should actually try and measure them but they definitely sound different. The genuine CSL one has more of a growl and deeper tone. Similar but definitely different.

[EthanolTurbo]

Did you go through with this. I’m thinking about getting the race box as well since the flap is kinda pointless right?


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Not yet. But yeah I think the flap is pointless especially for someone like me that values a more streamlined setup.

[usdmej]

I’m thinking about getting the race box as well since the flap is kinda pointless right?

if you're running the associated tubing with the flap, your around time driving will be quieter. max volume (with the flap open) will be the same

running the whole flap setup will create larger deltas between quiet and loud

[Cubieman]

Did you go through with this. I’m thinking about getting the race box as well since the flap is kinda pointless right?


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Flap is basically pointless unless your a nerd like me and want to create more wiring headaches for yourself.

I will say that my butt dyno maybe possibly feels more torque from a stop to say 30 mile an hour while the flap is closed vs. leaving it open. I have no evidence to back that up a though, just feels different but not an any substantial way.

I basically thought the flap was cool as well as all of the additional plumbing that goes with a real CSL vehicle.

[Grke46m3]

I'm about to place an order for the Karbonius Race airbox. It's $1950 and has the integrated snorkel.

Did you go through with this. I’m thinking about getting the race box as well since the flap is kinda pointless right?


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[SQ13]

While that is true when looking at extreme differences in power. More power does just mean more air in and more air out, subsequently more noise. However, you rarely (never) see people saying how much louder their induction noise is after having their car tuned. Sounds like SQ13 is hunting for a particular resonance that you get from the airbox based off the harrys garage clip he linked. I don't think that is tied to its peak hp on the dyno shown, just with the way he's driving since from my experience I get that exact noise from the low end pickup with high load.

Thinking about it, I don’t think it’s fair to compare a vid of a CSL to what I hear in real time inside my car. Comparing a video from inside my car to the CSL vid would be a better comparison. I’ll give that a try during a spirited drive sometime soon.