Renntech CF Airbox Installed - Review

Nachtsturm · 12-12-2011, 12:38 PM

Well it has been installed for afew weeks now, just haven't had much time to post and host pictures.

I am on the quest for 12's N/A, having high flow filters, Kleemann Headers and tune, the Renntech box just seemed like the next logical step.

Figured, I would compare the AFE Dry Flows vs the Stock filters first.

If you notice the AFE filters, are much thinner than stock. While the K&Ns are even thinner the the AFEs. The quality of the AFEs are superb, however, fitment was much better on the K&Ns. On the AFE's fitment it takes some finessing, as they seem about 1mm to short. Going oil-less was worth the compromise IMO.

Now on to the CF box.

Next to each other on the work bench

Notice the CF is much taller than the stock box, right around a inch. Or 50% larger.

What do they look like inside though?

Stock Box

Renntech Box

This is where I see the biggest the difference. The renntech box is completely baffle free. That combined with the larger space, I can see how these are making more power at the wheels.

Before:

Installed:

Installation was simple of course, though getting that front vanity cover on was a bit of a chore. Since the box is much thicker than stock it will take some oopmh to get it to clip in.

Driving Impressions:

There is a definite increase in throttle response and the sound did change. I love it. Reminds me of the days on carburetor engines when you flip the air-cleaner lid upside down. Much deeper and louder, sounds fantastic. I can also honestly say I felt an increase in the arse dyno as well.

Overall, I would say the Renntech CF airbox is worth the freight if you can find one used. There are at least 3 independent dynos now showing a consistent whp increase ranging from 10-20whp. I have no reason to doubt those gains. Thanks again Betrezra for selling me the box.

Track time will have to wait to spring as winter is official here.

The CLK55 is now in storage and winters are on the ML55.

Next up, high flow secondaries and perhaps a retune on a dyno.

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betrezra · 12-12-2011, 02:40 PM

Looking good!

togaclk55 · 12-12-2011, 03:29 PM

Nice write up!

elijah · 12-12-2011, 08:07 PM

Good stuff!
How much is a new Renntech CF airbox?

dre5373 · 12-12-2011, 08:41 PM

Awesome writeup Nachtsturm, looks fantastic

Should be all you need for 12's! I was working on a modded stock intake but I'm waiting to see if the Needswings C55 dual CAI actually pans out now

wawy · 12-12-2011, 08:45 PM

You finally found one? Good job as they're pretty rare unless purchased new. Do you plan on getting a tune that compliments the box?

Kreuzfeuer · 12-12-2011, 09:02 PM

Soooo clean... Does anyone make a CF front cover?

2MCHCAR · 12-12-2011, 09:56 PM

Looks Great!

elijah · 12-13-2011, 08:56 AM

http://www.renntechmercedes.com/www/node/625

1895$ is pricey! Renntech is general is just overpriced!!

novae500 · 12-13-2011, 09:25 AM

Thats why you buy used. Let the original owner take the hit...good to see the gains you made w/the renntech box.

Nachtsturm · 12-13-2011, 10:57 AM

Thanks all for the props.

Quote:

Originally Posted by dre5373

Awesome writeup Nachtsturm, looks fantastic

Should be all you need for 12's! I was working on a modded stock intake but I'm waiting to see if the Needswings C55 dual CAI actually pans out now

Sure hope so.

My goal is anything in the 12's and 110mph traps. The needswing dual CAI, is that actually coming to fruition? Thought it was nixed. Be great for people to have more options.

Quote:

Originally Posted by wawy

You finally found one? Good job as they're pretty rare unless purchased new. Do you plan on getting a tune that compliments the box?

I do plan on getting a retune once I put in highflow secondaries. I did talk with Kleemann, and he said it was not necessary. But I think some HP might be left on the table if I don't.

Quote:

Originally Posted by elijah

http://www.renntechmercedes.com/www/node/625

1895$ is pricey! Renntech is general is just overpriced!!

Gotta pay to play, most of my friends and family think I am crazy for spending the amount I did on a used airbox. I disagree.

If you find one used, I'd buy it. Don't forget at the 1895 price, you also have to sacrifice your stock AMG box.

It is expensive, but it is the best option out there for intakes. You could do an E55 intake, but remember Hooleyboy's dyno'ed the E55 intake and Renntech box back to back. The Renntech made 15whp more. Also it seems a decent E55 complete setup is around 450ish, I would just spend the extra 4-5hundred and get the real McCoy.

Kevwood · 12-14-2011, 08:44 AM

That's some good looking hardware there

elijah · 12-14-2011, 03:06 PM

My girlfriend asked me what I wanted to Christmas and well... I hope it'll be under the xmas tree!!

hoontastic · 12-14-2011, 04:23 PM

she could hide it in a flat panel tv box and really get you good.

12-12-2011, 02:40 PM	#2
betrezra MBWorld Fanatic! Garage is empty, add now Join Date: Nov 2009 Location: Texas Posts: 1,562 Drives: CLK55	Looking good! __________________ All hail Fleming Kleemann!

12-12-2011, 08:07 PM	#4
elijah MBWorld Fanatic! Garage is empty, add now Join Date: Dec 2006 Location: EURO Style Posts: 1,305 Drives: W209 CLK 55 AMG	Good stuff! How much is a new Renntech CF airbox? __________________ BLACJ on BLACJ

12-12-2011, 08:41 PM	#5
dre5373 Senior Member Garage is empty, add now Join Date: May 2011 Location: Maryland Posts: 307 Drives: 2006 C55	Awesome writeup Nachtsturm, looks fantastic Should be all you need for 12's! I was working on a modded stock intake but I'm waiting to see if the Needswings C55 dual CAI actually pans out now __________________ 2006 C55 Alabaster White/Ash Mods: K&N Filters, Eurocharged Tune, Kleemann Headers, Dual Exhaust w/ X-Pipe (no cats), AMG Flat Badge, Single Fin Grille, S Class Style LED Tail Lights, Clear Side Markers, AMG Side Badges, 19" SL65 Reps, 235/265 General G-Max AS-03's, 35% Tint. Soon to be installed: Wavetrac LSD, AMS Crank Pulley...

12-12-2011, 08:45 PM	#6
wawy MBWorld Fanatic! Garage is empty, add now Join Date: Jul 2003 Location: Western Canada Posts: 1,486 Drives: 2006 C55 AMG	You finally found one? Good job as they're pretty rare unless purchased new. Do you plan on getting a tune that compliments the box? __________________ 2006 Diamond Black C55 AMG RENNtech Monolites 19x8.5/9.5 with Toyo Proxies T1R RENNtech Carbon Fiber Airbox Resonator delete RENNtech airbox dyno: http://www.mbworld.org/forums/c32-am...dent-dyno.html Previous: 2002 C32 AMG 2003 C320 2002 C230 1998 BMW323is

12-12-2011, 09:02 PM	#7
Kreuzfeuer Senior Member Garage is empty, add now Join Date: Jan 2010 Location: Murfreesboro, TN Posts: 318 Drives: SRT-6	Soooo clean... Does anyone make a CF front cover? __________________ 2005 SRT-6 Coupe / Graphite Metallic / Cedar Eurocharged Tune + 65mm Pulley \| Walbro 255lph Pump \| Needswings CAI, Catch-Can, Pulley Saver Kit CTD Clear Markers \| Startech GmbH Steering Wheel \| Custom Cedar Interior Mandrus Wilhelm 18x8.5 +32mm (F), 19x9.5 +25mm (R) 1 Corinthians 1:18-31

12-12-2011, 03:29 PM	#3
togaclk55 Super Member Garage is empty, add now Join Date: May 2011 Location: Bay Area, CA Posts: 861 Drives: CLK55	Nice write up!

12-12-2011, 09:56 PM	#8
2MCHCAR MBWorld Fanatic! Garage is empty, add now Join Date: May 2008 Location: Los Angeles, CA Posts: 1,018 Drives: Supercharged CLK500 & ML500	Looks Great! __________________ Current Mods: Kleemann Supercharger-Bilstein HD Shocks-H&R Front/Rear Sways-19" MRR GT1's-CLK Black Series CF Rear Spoiler-EUROteck CF Front Lip-Kevlar Intake Tubes-Projector Fogs-HID Fogs-8000K Fogs & Low Beam-Custom Steering Wheel-Brabus Illuminated Shift Knob-Non-AMG Sprint Booster-///AMG Pedals-7" Kenwood Indash Radio/Navigation w/ IPhone Control-12" JL Audio W6v2-And a few other mods....

12-13-2011, 08:56 AM	#9
elijah MBWorld Fanatic! Garage is empty, add now Join Date: Dec 2006 Location: EURO Style Posts: 1,305 Drives: W209 CLK 55 AMG	http://www.renntechmercedes.com/www/node/625 1895$ is pricey! Renntech is general is just overpriced!! __________________ BLACJ on BLACJ

12-13-2011, 09:25 AM	#10
novae500 MBWorld Fanatic! Garage is empty, add now Join Date: Jan 2009 Location: Northern VA Posts: 1,826 Drives: W211	Thats why you buy used. Let the original owner take the hit...good to see the gains you made w/the renntech box. __________________ 05 E55: K&Ns, MBH LTH, Renntech 168mm, EC H/E, 010 Bosch, HRE 547r, TTM scoops, CF VRP Engine cover, AZN Leds *Custom tuned by Jeremy @* 06 E500 4matic: K&Ns, Renntech V3 ELM,

12-14-2011, 08:44 AM	#12
Kevwood MBWorld Fanatic! Garage is empty, add now Join Date: Jul 2010 Location: A Canadian in Dubai, United Arab Emirates Posts: 4,166 Drives: '05 C200K SS, '05 Kleemann CLK500K & '92 Z34 5sp (track car in Canada)	That's some good looking hardware there __________________ Kleemann S8 CLK500< Kleemann supercharger, cams, headers & tune \| H&R springs and sways \| Koni adjustable suspension \| Brembo GT BBK (6F/4R piston, slotted floating composite rotors) \| Carbon fiber front lip & rear diffuser \| Custom Magnaflow exhaust, quads with 100 cell cats \| GPT pulley \| Vorsteiner carbon fiber rear spoiler \| Quaife LSD \| E55K airbox & kevlar tubes \| Magnecor KV85 wires \| 360 Straight 5ive wheels, carbon fiber \| Mods/build thread

12-14-2011, 03:06 PM	#13
elijah MBWorld Fanatic! Garage is empty, add now Join Date: Dec 2006 Location: EURO Style Posts: 1,305 Drives: W209 CLK 55 AMG	My girlfriend asked me what I wanted to Christmas and well... I hope it'll be under the xmas tree!! __________________ BLACJ on BLACJ

12-14-2011, 04:23 PM	#14
hoontastic Senior Member Garage is empty, add now Join Date: Apr 2011 Location: Portland, OR Posts: 326 Drives: 99 c43 / 99 ml430	she could hide it in a flat panel tv box and really get you good.

12-14-2011, 04:23 PM
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