RENNTECH C74 mod for my 2010 C63 AMG

[Maverick1975]

Congrats, i think that looks pretty damn good!

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[Roswell]

Amazing work.. Very aggressive & unique!! This kit must be expensive as hell.

[cosmiciron]

Originally Posted by amdeutsch

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.

[cosmiciron]

Originally Posted by Roswell

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.

[cosmiciron]

Originally Posted by j bro

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.

[cosmiciron]

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.

[amdeutsch]

Originally Posted by 604 C63

From the Renntech site:

Originally Posted by cosmiciron

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".

[Naif647]

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?

[cosmiciron]

Originally Posted by amdeutsch

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.

[cosmiciron]

Originally Posted by Naif647

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.

[BO Knows]

Originally Posted by cosmiciron

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/

[cosmiciron]

Originally Posted by BO Knows

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.

[BO Knows]

Wow! Nice pictures I'm surprise after spending over $15K USD Renntech didn't give you C74 badges..

[cosmiciron]

Originally Posted by BO Knows

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.

[Naif647]

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

[CPBRI]

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!

[yazid]

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!

[cosmiciron]

Originally Posted by Naif647

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

[cosmiciron]

Originally Posted by yazid

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...

[LuisC55AMG]

That is a sick ride. Did you notice any changes on the handling characteristics?

[bushburninc63]

Originally Posted by wankeldude

way too much action for my liking

this

[cosmiciron]

Originally Posted by LuisC55AMG

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...

[Rob@vividracing]

Congrats your C63 is super impressive.

[blindfold]

nicely done in China 看到老乡啊

[cosmiciron]

Originally Posted by blindfold

nicely done in China 看到老乡啊

呵呵！不容易啊！