*** $1,500 CF Airbox with HP benefits ***
Theoretically, you already have the RT airbox sitting under your hood, so why pay for another one that you probably won't be able to sell - at least not for what you payed.
Normally I would have no problem doing this.. Heck, normally, I would of had a pack of lawyers on Renntech's butt getting this problem resolved..
My real issue is that the "distributor" that I went through is a valued friend, and I dont want to drag him through this. My money is with them, their money is with Renntech.. See the issue now?
If I dispute the charge, it will come out of the distributor's pocket, and then they'll have to fight with Renntech to get their money back.
I won't cause them grief because my decision to purchase that product... When I told him to get it for me, he asked me twice "Are you sure?"...
Really, the problem was that there wasnt enough information available for me to make a proper decision on whether to buy or not, and now having learned all of this, it's basically too late. I am sure some people that have this Renntech system will be a little suprised/shocked at learning some of this info also.
It's ok.. Even if the box arrives in a few weeks or months, I've gotten to the information I was after and I have moved on. I will raffle it off and raise whatever money I can to recoup the costs.
My concentration is on making OUR product now.
Thanks for the input and the support! Much appreciated.
Theoretically, you already have the RT airbox sitting under your hood, so why pay for another one that you probably won't be able to sell - at least not for what you payed.
They have to know that sooner or later some one was gonna find out their little scheme........as the saying go ..."you can fool the people sometime,but you cant fool the people all the time"
Unless Renntech comes on the board and make a formal apology for misleading the people,i vote that everyone should not use any Renntech products.
They claim 15-20% rwhp with their c/f airbox mod.......everyone that uses it claimed it makes 0-3 rwhp.And who is to say if this gain was not done on a day with better wether condition.
This is real dissapointed,b/c i was just about to purchase one of theif c/f air boxes.
Look on it like this,they might have won the battle ,but they have lost the war.As tuners their business thrives on people that are automobile enthuiast with a quest for performance that exceed stock performance.
Come on Renntech........its your move next.......we are all watching to see what move if any you are gonna make.If you are still pondering at this point,i would at least say ...refund the money,its the honarable thing to do,plus it may help you save some customers.
My hats off to you guys-1 for taking the time,effort,and capital required to develop what looks to be an outstanding product-that will no doubt overdeliver in the performance as well as the cost end
and 2-call renntech out not only on their customer service abilities but also on what they are selling as well.
GOOD LUCK!!!!! and godspeed
BTW, did you get my email response about where that hose connects to? It goes to the driver's side manifold.. Its the PCV line that runs between the airbox and manifold.
Secondly, If you've all logged in to the ofoto site and went through the pics you will know by now that the Renntech Airbox does indeed use the STOCK MB lower airboxes.
At first I thought that they did this because they wanted their kit to look more impressive.. After looking at the high res versions of Lou's pics that he graciously emailed me, I figured it out...
They purchase brand new airboxes because they HAVE TO. They not only use the stock BOTTOM airboxes, but they also use the TOP pieces also.. You see, MB will not sell the top half of the airbox separately. You have to buy the complete bottom & top piece.
Why does Renntech use the TOP half you say?? Well.. If you look at the pic below, you will see that it is of a STOCK TOP part of the airbox turned upside down. What Renntech does is applies their CF mold ONTOP of the stock airbox. Lou tells me the Renntech version of the top airbox is taller than stock (I cannot verify this, but it appears to be), so they most likely cut open the stock top portion and make it taller by apply their own top box over it.
It isn't even a pure CF piece. The pictures I posted at the beginning of the thread was REAL, PURE CF (Compare those pics with what you see below) This is an example of what Vivid was talking about.. A fiberglass resin with a LAYER of CF spread out ontop of it.
They also supply a set of STOCK PAPER FILTERS with the kit.. WHY???? I dont get that... Heck, they could of at least put in a set of BMC or Greens, or K&Ns .... I hope in their advertising of this product they dont market it as PURE CF because it clearly isnt!
Renntech has made their customers pay for a new complete set of STOCK MB airboxes simply because they didnt want to create their own mold for the mounting frame of the top airbox.. Had they of made their own mounting frame, there would be no need to spend all that money on a stock airbox assembly... Its simply a waste...
I am so amazed and shocked, I dont even know what to say anymore... I'll let the picture speak for itself.

I did get your e-mail and was able to trace the hose on my wife's E55 and the found the inlet on my SL. Thanks,
Lou
The Best of Mercedes & AMG
Last edited by dragonAMG; Aug 6, 2006 at 12:55 PM.
Lou
As I said, they have a right to defend their business. It is HOW they go about it that matters. We do not know yet for sure EXACTLY what happenned. As Victor can attest, I have been in the middle of it for months now but did not want to go public until I was sure that there is a disconnect (which there is). Let's just make sure some wires weren't crossed elsewhere before we decide.
But, friendship not withstanding, if I call a distributor and cancel an order that's past due with no delivery in sight, the words I expect to hear are, "I'm on it," not, "Well, that's just the way they are, you'll have to wait and see."
Friendship is a 2-way street. I'm not banging on you - it's just that I've been down similar roads before and I don't want to see you get burned because you're a nice guy. My perspective. Do what you feel is right.
You are being cryptic. "In the middle of" what?
I am sure Renntech sells a number of these boxes to different distributors including dealers. How could they possibly know where Victor ordered his from?
Now what we need is for one of you other brainiacs to come up with a fix for re-flash and look into the by pass valve...do it in your home lab and pass the savings along to us all !!!
When you compare the stock unit to the RT upper portion of the box there is a significant difference. The cone shape where the 2 sides meet is a strange looking thing and probably serves a purpose---it is something that you probably would not logically design. That said the unit is pricey and probably costs 1/3 of he retail price to produce. However all RT stuff is expensive. To the other poster who stated the products are for the affluent who don't get their hands dirty and have someone else do it I will personally take exception since I certainly do get dirt under the fingernails from toying with my cars.
I would not say that Renntech is less than honest since my RT mods on my SL have been very good---- Overpriced but good but look at my signiature. This is not the first time and probably not the last time that I will throw money down the drain.
You are being cryptic. "In the middle of" what?
I am sure Renntech sells a number of these boxes to different distributors including dealers. How could they possibly know where Victor ordered his from?
Here is my take, and please note that it is MY TAKE!! I heard it from nobody and have NEVER spoken to RENNTECH.
Months ago before it was extremely clear what VRUS was up to, I had a "premonition" that he was not going to get the box. As I said, Victor can vouch for that and I'd rather not get into details on the whys and hows because it does not change ANYTHING. At the time, it may not have even been true as we all know how I am with spewing at the mout. This is EXTEREMLY common practice in the business world. That is why there are rules and regulations to protect against monopolization AND defend business. I do not believe that prohibiting VRUS from getting a RENN box is illegal or unethical. That is simply my opinion. BUT, I do have issues with how it APPEARS to have been handled. If they single handedly took his $$ and have just decided to ignore him, then that is simply bad business and they will pay with their reputation. I still do not see it as illegal as VRUS has not demanded his money back. Keep in mind he dealt with a distributor and that is who he would need to demand it from (as he already said).
Now, as for how they know which box is for him. How many orders do you really think they get for a simple box? It is low. Victor is not the only one not getting a box. NOBODY IS. The only way I know of to get on the "priority" list for now is to pay for and get a full blown Stage 5.
Hope this helps. I wasn't trying to stir any pot and have stayed private about this for some time. However, I think the info I had is out so i spoke up because I did not want people to over-react and hate RENN IF they were not the sole contributor. I am not saying they were or were not. i am simply saying to wait and see what happenned. VRUS is being patient, so why not the rest of us?
I will play devil's advocate here. How do we know that VRUS' distributor did not play a role? How do we know that VRUS was not planning on "stealing" the design? I understand the truth as VRUS and I went round and round with your exact same questions MONTHS ago. Unfortunately, I am not in a position to vouch for him or this project so my opinion is not important. The risk is obvious and RENN should have acted or they would never last as a company.
If Renntech continue to hold the money,this thread is gonna be the biggest thread this site has ever seen,because Renntech is now holding money for 29 angry people,not to mention people who might have been dissopointed with their service at one point or another.
There are people waiting to get an airbox from Renntech,but now they are pondering,waiting on the outcome of this saga.

RENNTech is not a fly-by-night company and for the price of one airbox, I don't think they would risk the good will they have long enjoyed in the Mercedes market.
Just my thoughts...
MachC5
If Renntech continue to hold the money,this thread is gonna be the biggest thread this site has ever seen,because Renntech is now holding money for 29 angry people,not to mention people who might have been dissopointed with their service at one point or another.
There are people waiting to get an airbox from Renntech,but now they are pondering,waiting on the outcome of this saga.
Last edited by MACHC5; Aug 6, 2006 at 05:02 PM.
I hate to say this, since you already know I am a big fan of your relentless quest, and I am behind you 100%. So please dont take this the wrong way.
But the way I see it is that this post has already had close to 5,000 views, many by those who have Renntech parts, and possibly even by those with strong Renntech affiliations. I would suspect that Renntech is aware of this post and is very much aware of your mission and, to be honest, if I was in their shoes I wouldnt be making it easier for you to produce a competitive product at a cheaper price.
If someone called my company to purchase one of my machines that I had spent considerable R&D and had much intellectual capital invested, and I came to hear that it was not going to be used for anything else than to be the reference part for the launch of a competitve product, I would definitely not make it easy. Call me shallow, but hey, thats how I make my living. Protecting my products as best I can.
Dont want to discourage you in any way.
if i was hartmut, i would refund him his money along with a letter stating that he has no right to use a RENNtech product as a baseline for proprietary development, have a nice day. maybe after making him wait for a while too. just for fun.
"let's all get together and buy a RENNtech box, and if it is good, let's copy it and discard the original on eBay to recoup our cost because we captain's of industry don't want to pay for the genuine article."
that is the most ridiculous thing i have read all week. you have 90k cars, with 20k in mods, bur you want to stick it to RENNtech. logic train not at the station.
Here, let me give you the Cole's notes version..
- We want to build a CF airbox FROM SCRATCH
- Before we spend Thousands of dollars in making OUR OWN DESIGN, lets do a quick test of ** 1 OF ONLY 2 ** aftermarket airboxes that claim they improve performance. GruppeM or Renntech.
- I chose the RENNTECH box because I THOUGHT IT WAS BETTER!
- If I put the Renntech box on my car and it DID NOT IMPROVE POWER, then we would all know that pursuing an alternate design to the stock system might be an excercise in futility and a waste of our time. If it did make power, then it would prove there was room for improvement.
- I was going to sell off the "TEST" box (ie. Renntech box) and start doing the design of ours).. I already talked to Vadim (formerly Evosport) to make use of his design and he graciously agreed to send me his cad drawings so that I could review them and we could discuss how to move forward.
I stated NUMEROUS times that I had no intention of copying Renntech's design... Come on.. Use some common sense.. Do you actually think I would POST ON A PUBLIC FORUM on a day-to-day basis if I intended to rip off someone's design and then try to sell it to the market at a lower price????
Don't you think I would have *** QUIETLY & DISCRETELY *** purchased a Renntech box if I was "up to no good"???
Oh.. and by the way... Since when is it wrong for someone to purchase a COMPETITIVE Product to test it and see how it stacks up against what you want to develop???
Are you telling me that Microsoft doesnt have guys buying Oracle's Database Server so they can compare its features,stregths & weaknesses against their own product (SQL) ????
No.. In business, competitors never evaluate each other's products...
Heck... I at least have the guts to do it publicly and am showing that I have ABSOLUTELY nothing to hide.
Jesus H....
if i was hartmut, i would refund him his money along with a letter stating that he has no right to use a RENNtech product as a baseline for proprietary development, have a nice day. maybe after making him wait for a while too. just for fun.
"let's all get together and buy a RENNtech box, and if it is good, let's copy it and discard the original on eBay to recoup our cost because we captain's of industry don't want to pay for the genuine article."
that is the most ridiculous thing i have read all week. you have 90k cars, with 20k in mods, bur you want to stick it to RENNtech. logic train not at the station.
Last edited by vrus; Aug 6, 2006 at 08:02 PM.
Regarding Renntech using AMG parts ... I actually really like that. I noticed on my supercharger kit that all the hoses etc were AMG parts.
Since the arrival of the Renntech airbox seems to be in question ... perhaps someone that already has one can dyno with it on and then go back to thier stock airbox and do a dyno. Should give Vrus the same info that he is looking for.






