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RENNTECH C74 mod for my 2010 C63 AMG

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Old 09-27-2011, 07:19 AM   #26
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Congrats, i think that looks pretty damn good!
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Old 09-27-2011, 08:20 AM   #27
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Amazing work.. Very aggressive & unique!! This kit must be expensive as hell.
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Old 09-27-2011, 09:08 AM   #28
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Originally Posted by amdeutsch View Post


You do know how track width is measured, don't you? And based on MB stated interior shoulder width there is NO WAY.
Why is it no way? I don't understand.... It's what RENNTECH said and it worked.
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Old 09-27-2011, 09:11 AM   #29
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Amazing work.. Very aggressive & unique!! This kit must be expensive as hell.
Actually I think it is quite reasonable... The C74 Full Wide Body Aero Package costs $15,450 which to me was well worth it. The wheels are a little expensive though.
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Old 09-27-2011, 09:17 AM   #30
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looks awesome, should try take some pictures in some sunlight as well, to be able to see all the new add ons better
I will shoot more photos once I have the new CF hood installed.
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Old 09-27-2011, 09:21 AM   #31
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I've got a question -- I'm contemplating lowering my car to give it more aggressive look. However, I'm worried it will change the way the car drives, as well as making it less practical... or potentially hazardous. I'd love to hear your opinions. Thanks.
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Old 09-27-2011, 06:32 PM   #32
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Quote:
Originally Posted by 604 C63 View Post
From the Renntech site:

Quote:
Originally Posted by Renntech
:The complete C74 conversion kit includes our proprietary rear deck lid spoiler, rear diffuser package featuring distinctive exhaust tips, front and rear fender flares and wide body conversion kit. This combination increases the overall vehicle rear track width to 74” and allows for the ability to run up to an 11” wide rear wheel with a 315 series tire for the ultimate in handling and traction.
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Originally Posted by cosmiciron View Post
Why is it no way? I don't understand.... It's what RENNTECH said and it worked.
Ready for a math lesson?

Here is how MB measures track width (and I choose to believe them)



Now I don't have figures for the offset and OEM axle/hub mods on a C63 because I'm way too lazy to STFF; but the std C63 is at the most 1" wider than the displayed 61" (F) / 61.1" (R) on the std W204.
Looking at that pic again it gives a front width of 69.7".
Now giving credit for about 3" each (to be verified) on the fender flares equates to a total of 75.7" (F). Tires are inside the flares. Adding a 0.1" (R) differential based on MB displayed width equals to 75.8" (R).
Now look at the fact that Renntech claims 315 sized tires will fit and the OP is running 305 sized tires; 305 mm = 12". The tires in the OPs pictures DO NOT stick out passed the fender flares.

Giving the benefit of the doubt and taking the overall estimated width (with Renntech fender flares) and using MB defined track width guidelines (after all Renntech is a recognized MB tuner and never would cheat on numbers ) there is absolutely no way that the track width is 74".

Last edited by amdeutsch; 09-28-2011 at 06:00 AM.
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Old 09-27-2011, 09:02 PM   #33
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So what happens when you put wider tires, like 11'' rims, and then have 2 heavy people in the back of your car or say 3?? Does the original fender hit the tire from the top, eventually hurting both the body and tire?

Will I have to shave off or cut the original fender if I want wider fenders molded or glued on and wanted wider tires?
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Old 09-27-2011, 10:48 PM   #34
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Quote:
Originally Posted by amdeutsch View Post
Ready for a math lesson?

Here is how MB measures track width (and I choose to believe them)



Now I don't have figures for the offset and OEM axle/hub mods on a C63 because I'm way too lazy to STFF; but the std C63 is at the most 1" wider than the displayed 61" (F) / 61.1" (R) on the std W204.
Looking at that pic again it gives a front width of 69.7".
Now giving credit for about 3" each (to be verified) on the fender flares equates to a total of 75.7" (F). Tires are inside the flares. Adding a 0.1" (R) differential based on MB displayed width equals to 75.8" (R).
Now look at the fact that Renntech claims 315 sized tires will fit and the OP is running 305 sized tires; 305 mm = 12". The tires in the OPs pictures DO NOT stick out passed the fender flares.

Giving the benefit of the doubt and taking the overall estimated width (with Renntech fender flares) and using MB defined track width guidelines (after all Renntech is a recognized MB tuner and never would cheat on numbers ) there is absolutely no way that the track width is 74".
Wow.... that's very technical stuff.... I have to admit I do not have sufficient knowledge on this area. Thanks for the insight.

Last edited by amdeutsch; 09-28-2011 at 06:00 AM.
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Old 09-27-2011, 10:51 PM   #35
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Originally Posted by Naif647 View Post
So what happens when you put wider tires, like 11'' rims, and then have 2 heavy people in the back of your car or say 3?? Does the original fender hit the tire from the top, eventually hurting both the body and tire?

Will I have to shave off or cut the original fender if I want wider fenders molded or glued on and wanted wider tires?
I understand that the original fenders have to be modified somewhat, and RENNTECH gives precise instructions on what to do. I can check the manual if you are interested.
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Old 09-28-2011, 04:34 AM   #36
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Quote:
Originally Posted by cosmiciron View Post
I understand that the original fenders have to be modified somewhat, and RENNTECH gives precise instructions on what to do. I can check the manual if you are interested.
Yes, please upload the manual. I heard that the exhaust tips are attached to the Rear Diffuser. Is that true? Did you cut your AMG tips? This is your car right? http://news.renntechmercedes.com/201...ermarket-show/
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Old 09-28-2011, 05:03 AM   #37
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Originally Posted by BO Knows View Post
Yes, please upload the manual. I heard that the exhaust tips are attached to the Rear Diffuser. Is that true? Did you cut your AMG tips? This is your car right? http://news.renntechmercedes.com/201...ermarket-show/
I will go grab the manual this weekend. And, yes, the car is mine.























Hope these give you better ideas on the mod.
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Old 09-28-2011, 05:16 AM   #38
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Wow! Nice pictures I'm surprise after spending over $15K USD Renntech didn't give you C74 badges..
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Old 09-28-2011, 05:26 AM   #39
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Wow! Nice pictures I'm surprise after spending over $15K USD Renntech didn't give you C74 badges..
LOL, yeah I was surprised too... The ones I bought are really cheap looking and I always suspect they will fall off at the car wash sooner or later.
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Old 09-28-2011, 06:12 AM   #40
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Yea bro it would really be appreciated if you were able to upload the manual and shed some insight about the fender modification..
ALSO, are the 4 exhausts all connected? Or is it just a cosmetic mod? And since they are stuck to the carbon fiber, can the heat cause the diffuser to melt a bit? I know my friend who had an Audi S5 with a custom diffuser faced that issue 2 days after installing it..

Thanks,
Nayef
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Old 09-28-2011, 07:41 AM   #41
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I do wish the rear fender was a bit more muscular, but the Renntech pushes it a bit far for me. Regardless, good looking ride!
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Old 09-28-2011, 09:30 AM   #42
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cosmiciron: congrats on modding your C63 with renntech!!! love it!! every single bit of it.. however would probably opt the akrapovic tip on this setup.. but anyways.. its gorgeous! do keep us updated on your future mods.. your wheels are pretty interesting and i just in awe at the rear wheel arches along with the rear cf diffuser kit!
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Old 09-28-2011, 11:24 AM   #43
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Yea bro it would really be appreciated if you were able to upload the manual and shed some insight about the fender modification..
ALSO, are the 4 exhausts all connected? Or is it just a cosmetic mod? And since they are stuck to the carbon fiber, can the heat cause the diffuser to melt a bit? I know my friend who had an Audi S5 with a custom diffuser faced that issue 2 days after installing it..

Thanks,
Nayef
Here are the manuals:

File 1:
File Name: C63 Front Fender Flare Instructions booklet.pdf
Description: C74 installation manual
File Size: 2.6 MB
Download Link: http://www.sendspace.com/file/us5sxl
File 2:
File Name: C63 Front Splitter Instructions booklet.pdf
Description: C74 installation manual
File Size: 1.1 MB
Download Link: http://www.sendspace.com/file/5fws2y
File 3:
File Name: C63 Rear Decklid Spoiler Instructions booklet.pdf
Description: C74 installation manual
File Size: 454.3 KB
Download Link: http://www.sendspace.com/file/kucz5x
File 4:
File Name: C63 Rear Diffuser Instructions booklet.pdf
Description: C74 installation manual
File Size: 2.4 MB
Download Link: http://www.sendspace.com/file/f3n8ko
File 5:
File Name: C63 Rear Fender Flare Instructions booklet.pdf
Description: C74 installation manual
File Size: 5.2 MB
Download Link: http://www.sendspace.com/file/ec6amp
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Old 09-28-2011, 11:27 AM   #44
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cosmiciron: congrats on modding your C63 with renntech!!! love it!! every single bit of it.. however would probably opt the akrapovic tip on this setup.. but anyways.. its gorgeous! do keep us updated on your future mods.. your wheels are pretty interesting and i just in awe at the rear wheel arches along with the rear cf diffuser kit!
I'm glad you liked it I love the wheels too, although I wish I ordered the 20" ones instead. As it is, the wheels look a bit on the small side because the center of the wheel is so deep inside. And the red strip further reduces the perceived size...
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Old 09-28-2011, 11:58 AM   #45
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That is a sick ride. Did you notice any changes on the handling characteristics?
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Old 09-28-2011, 04:32 PM   #46
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way too much action for my liking
this
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Old 09-28-2011, 07:03 PM   #47
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That is a sick ride. Did you notice any changes on the handling characteristics?
Aside from the usual improvement from getting wider tires, no. I have not had the chance to drive it at higher speeds -- Beijing's traffic pretty much turns any cars into stationary show piece. You have no idea how much I miss the roads in the States...
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Old 09-28-2011, 07:17 PM   #48
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Congrats your C63 is super impressive.
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Old 09-28-2011, 09:37 PM   #49
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nicely done in China 看到老乡啊

Last edited by blindfold; 09-28-2011 at 09:43 PM.
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Old 09-28-2011, 09:52 PM   #50
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nicely done in China 看到老乡啊
呵呵!不容易啊!
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