Let me see if I understand this correctly:
Initial problem with installation instructions?
Problems with torque specs?
Problems with the supplied bushing removal tool?
Suppled washers must be modified to fit?

Really? REALLY?

Some Issues after spending $1000 for the kits. They’re installed tho and I’ll report back with my review on them. I feel like whoever they have making the kits needs to truly test fit and oversee production of these kits to make sure they pass qc.

BACKGROUND RE - W205 C63 S “Coupe”:

Rear (Camber & Extra Toe) adjustment #502326-1K.



This is “separate rear kit” to the C63’S’ sedan and wagon (#502226K).

We manufacture both upper arms and lower arm adjuster kits. Plus Strut Adjusters (Front & Rear to suit all Mercedes Benz Models 1968 to 2023)


Strongly recommend lower arm adjuster kits (Especially for C63 S “Coupe”) !


CHECKLIST:

1) Upper arms more difficult to fit.

2) Then also time consuming to adjust (and accurately).

3) Plus to resolve costly, premature excess inner edge tire wear - top of tire needs to adjust “outwards” reducing important clearance top of tire to outer fender.

4) C63 ‘S’ Coupe all upper arms OEM are fitted with spherical bearings. Only rubber is the ‘2’ Lower forward facing thrust arm bushes (K-MAC uprated replacement for these is #502628-1F).


COMPARED TO LOWER ARM ADJUSTMENT:

5) Fit without need for wheel or arm removal.

6) Retains important clearance top of tire to outer fender.

7) Ultimate adjustment - “direct on alignment rack under load”. (With easy access single wrench fast accurate).

8) Soft rubber OEM bushings then eliminated from rear suspension (other then #4 the ‘2’ thrust arm bushes). Further eliminating rear end flex, loss of traction.

NOTE: C63 S “Coupe: - The lower arms “inner bush” has OEM shim plates. You can purchase a offset plate but one position / inaccurate and only providing minuscule 3mm (1/8”) Camber change. K-MAC bush replacement provides serious adjustment - to fix it right the 1st. time with ‘4’ times the adjustment range and as described above precise accurate adjustment (under load) direct on alignment rack. This kit (#502326-1K) also includes extra ‘Toe’ -doubling the existing adjustment range.

Kevin

Yes - taking on the role of designing / inventing has and always will create / invite controversy ! In our case front and rear adjuster kits to resolve OEM suspension shortcomings. As Ferdinand Porsche (and echoed by Elon Musk) - “If you do not make a mistake you are not really trying”.

Constantly striving to simplify installation for DIY owners we find is also essential criteria.

At the end of the day it is all a whole lot better then having a “unblemished record” - sitting on the fence doing nothing flawlessly !

Kevin

IMO, I don’t think Ferdinand meant at the risk of screwing up other’s cars.

Over the years on multiple forums I see lots of people rushing to buy all kinds of ‘stuff’ from ‘companies’ magically appearing and hawking their wares. CAI’s, CF pieces, downpipes, s/w flashes, and on and on. I’ve seen some companies get banned. Others bad mouthed.

Image is everything, isn’t it? I might suggest you go back to the first post and forward. When you’re done reading of all the aggravation several have had, ask yourself is this the reputation you want.

Bruce - Phew, feedback like yours at times do wish portion was directed also to the hugely profitable OEM industry. Re their cost cutting by the elimination of ongoing Camber and Caster adjustment facilities ! .Putting the onus back on owners to prematurely purchase new tires !

YES - OF COURSE “IMAGE IS EVERYTHING”, But to be fair, (as explained) resolving OEM shortcomings, taking on new ways of doing things, operating outside of the square - criticism is and always will be inherent.

Look closer at the ‘3’ issues, problems - As pointed out the C63’S’ front kit (#503316-1) over 300 fitted. Not at all bad when you consider on top of this (latest count) shows we are manufacturing over ‘90’ OTHER SINGLE KIT PART No’S to suit Mercedes Benz Models !!

Majority to Wheel Align shops - and we do advise “kits should be fitted by qualified personnel”.

EXTRACTION TOOL - OK, yes a owner has shown a failure. The team at K-MAC since have spot checked numerous times and cannot duplicate but are now super aware !

These extraction tools we provide for the “Do It Yourself” owners as a “extra K-MAC feature” eliminating the need for special tool purchase.

INSTRUCTION SHEETS - #503316-1 (C63’S’ Front displayed see Post #36). FOR ‘DIY’ OWNERS - Agreed we need to simplify further !

GRINDING OF THE LUG - Yes we were alarmed re rear kit (#502226 for Sedan & Wagon) this upgrade in design we only introduced very recent - and had “ALREADY” as explained (Post #49) deleted the need for tap in fitment !

SUMMARISING - Catering for ‘DIY’ owners - Simplifying where possible is the number one priority and is forever ongoing !

Kevin


AUDI to VOLVO - K-MAC Experience Of Resolving OEM Suspension Shortcomings Since 1964 !

Bruce - new car industry would certainly like you.

Having no criticism as above for their cost cutting / deletion of ongoing front and rear adjustment facilities. Putting the onus back on owners to fund costly, premature tire replacement !



Re Ferdinand Porsche - Yes we’re certainly not on the same playing field!!! He was very much into solving problems but am sure he would be impressed with some of our many international Patents, design breakthroughs. (as patents are not granted easily).

Including Patents covering the ‘3’ BASIC SUSPENSION CONCEPTS:

“STRUT ADJUSTERS” - All positional providing the “quickest and biggest” adjustment system.

(Including latest Porsche models 718 / 982, 935 / 991-2 “Adjustable Strut tops” including both Street & Race versions !

“WISHBONE / A ARM” Adjustable ball joints - Now the industry standard.

“BUSH LINKS” Adjustable - No more time consuming disassembly which has plagued the industry for years. Now precise single wrench adjustment on car.

Kevin

And all these shortcomings makes your company rich. Oh darn…As I said, KMac is not Ferdinand. Enjoy counting your money selling kits that have been not adequately tested…by you.

Your words. Not mine. I’m done here.

Hi Bruce yes we are also done having covered the instruction sheet issue (post #36). Extraction tool and fit issue (post #56) !

Post #56 also pointed out…. It is the hugely profitable OEM industry that is “Rich”.

Untold finances to inject in Research and Development while we - miniscule aftermarket “manufacturer” (Yes K-MAC proudly manufactures - not just importing and relabeling) fund / invest well above our size in this R&D !!

As stated International Patents are not granted easily it requiring totally innovative ideas and pain staking Research and Development to resolve the issues with the new car industry deleting Camber & Caster adjustment facilities.

Kevin

You are absolutely correct in stating car manufacturers have money for R&D. You admit you do not.

Regarding ‘pain staking R&D’, it’s obvious this was not properly done by KMac. A shortcoming on your part based on the issues you pointed out yourself.

My suggestion? Get better at Marketing by not continually pointing out your failures on this forum. Makes you look bad. Hurts sales. You might want to reconsider not digging yourself a deeper hole by continually validating my concerns by writing about your shoddy instructions, fitment problems and hack tools.

Bruce your above quote:
“You are absolutely correct in stating car manufacturers have money for R&D”.


Yes this is the very crux of the issue which at no stage of your many inputs do you address.

The lack of this R&D or more accurately their cost cutting, deletion of Camber and Caster facilities - (which did allow owners ongoing adjustment capability). But now “onus is back on owners” with excess edge wear to “prematurely purchase” new tires !

OK we are not OEM instead small niche wheel align and upgraded suspension component manufacturers but with over 90 separate P/N’s (to suit 1968 to 2023 Mercedes Benz models alone) along with kits for 30 other makes / models.

POST #56 ABOVE EXPLAINED we did “update” design for kit P/N 502226 - (anything and everything can be improved) a component of which required a tap in fit - but within 3 weeks of its “initial release” this need was deleted.

We made a mistake and apologize sincerely, but be reasonable - new car industry is all about exact same thing constant, ongoing development - they’re not perfect having both failures, recalls !

Bruce - again we are really done. Must move on and looks like agree to disagree.

Kevin

We are.

Been awhile..

went to another track day with my new setup. The camber kits held up phenomenally! No movement whatsoever.

I’ll order the bushing kit soon

thanks KMac🤘🏽

I ended up getting 2nd place Street 4 Class

Yes, that’s right !

We do our proving on the race track in all out competition - big heavy V8’s. Main straight full speed then hitting corner race curbs - fully launching. Then slamming down broadside lap after lap !

Kevin


Have attached (See Spoiler) “Chassis Guide” along with “Quick Reference” sheet on Front and Rear kits covering virtually all models.

Front kits are Camber and Caster. Rear kits are Camber and “extra” Toe !

Note: Front kits add –1 after P/N if require Camber only (see Website and/or Catalog re complete listing).

Check PM Kevin please!

We supply worldwide DHL Express air $40 one kit, $20 each extra.

Kevin

Hello
i have 2010 c63 wheels with 42ET
but it doesn't fits my 2015 c63s sedan because of the calipers

will 15 mm spacers do the job ?

wrong thread to post your question..

How are the KMAc bushing holding up since you installed them? Any changes to camber settings? Noise etc? Do you still recommend them? Anything to notice? Thank you for your reply in advance. Very appreciate it.

Any updates on these? Im looking to get a set of camber kits for my '23 coupe for when I lower it. Carbahn seems to no longer sell their camber kit oddly. It seems like Kmac has both front and rear too

Installed KMac gear all over my S205 c63s wagon and it was a major problem from installation to adjusting. Kevin came back and supplied all new gear (I paid removal and re installation (AU. $1900) which only lasted a few months. Bushing system and hardware have major design faults. Just DO NOT use KMac. Go hardrace Australia which is in the wagon without any problem and the ride is so much better!
MERCEDES-BENZ C-CLASS W205 2015-2021

Hey man I appreciate your update on this. I didnt realize they made these parts. What did you end up installing from Hardrace?

Everything possible in their catalog.