F1 fabrication upper control arm vs kmac bushings
We manufacture both front “Upper control arm” adjusters along with “Lower arm” adjusters.
1. Upper ‘A’ ARM ADJUSTMENT: #502216-2J $380 (Both Sides)
● Both Camber and also Caster adjustable.
● Not welded, fabricated arms but replacement inner bushes allowing to retain the strength / security of the OEM / Factory alloy arms.
● Bush extraction tool included - fit without need for arm removal.
2. LOWER ARM ADJUSTMENT: #502216K $480 (Both Sides).
● Both Camber and Caster adjustable.
● Replaces also the ‘4’ Front highest wearing bushes.
● Easy access to adjust (single wrench - ultimate direct on alignment rack under load).
● Lower arm adjustment also available “Camber Only” #502216-1i $345 (Both Sides).
NOTE: When adjusting to resolve “premature excess inner edge wear” UPPER ARMS reduce important clearance top of tire to outer fender. LOWER ARMS Retain this clearance.
REAR SUSPENSION (Also all W211 incl AMG)
Lower arm Camber (& Extra Toe to compensate for addition of rear Camber adjustment)
AIRMATIC #502526K $480
COIL SUSP. #502126-1K $480
ALL K-MAC FRONT & REAR ADJUSTER KITS SPECIALLY DESIGNED SO NO NEED FOR SPECIAL TOOLS OR TIME CONSUMING CONTROL ARM REMOVAL.
ALSO MANUFACTURE:
UPRATED BUSHINGS - For the '6' Rear Multi link arms - Tauter response and less rear end flex, twitch, loss of traction. Especially when applying power to lane change / overtake #502528K $480
AUDI to VOLVO - K-MAC Experience Of Resolving OEM Suspension Shortcomings Since 1964 !
Last edited by K-Mac; May 19, 2024 at 07:54 PM.
We manufacture both front “Upper control arm” adjusters along with “Lower arm” adjusters.
1. Upper ‘A’ ARM ADJUSTMENT: #502216-2J $380 (Both Sides)
● Both Camber and also Caster adjustable.
● Not welded, fabricated arms but replacement inner bushes allowing to retain the strength / security of the OEM / Factory alloy arms.
● Bush extraction tool included - fit without need for arm removal.
2. LOWER ARM ADJUSTMENT: #502216K $480 (Both Sides).
● Both Camber and Caster adjustable.
● Replaces also the ‘4’ Front highest wearing bushes.
● Easy access to adjust (single wrench - ultimate direct on alignment rack under load).
● Lower arm adjustment also available “Camber Only” #502216-1i $345 (Both Sides).
NOTE: When adjusting to resolve “premature excess inner edge wear” UPPER ARMS reduce important clearance top of tire to outer fender. LOWER ARMS Retain this clearance.
AUDI to VOLVO - K-MAC Experience Of Resolving OEM Suspension Shortcomings Since 1964 !
Thanks again,
Lee




Kevin from KMac responds rapidly to emails but you have to take into account the difference in time and date zones. I found him very easy to work with.
On the other hand, a couple years after doing the front end, a small example as shown above, once the Rear Main Seal blew out causing plumes of smoke occurring after the mist of oil leaking from the Tranny Case hit my exhaust, I did the marathon build of the entire rear end including every rubber bushing as well as the Drive Shaft Disc’s and intermediate Bushing, all Subframe Mounts, 3.06 Final Drive Ratio Gears with new M-Factory LSD! I also did the Upper Rear Control Arm Bushings replaced with KMAC Bushings which do NOT inhibit one from fully torquing down each Arm until the rear is “weighted” because they are urethane as compared to being rubber and I was able to do that whilst the Subframe was lowered away from the underside of my car, much easier! How anyone can wait until fully “loading” the rear using OEM Rubber Upper Control Arm Bushings seems impossible as you cannot get a wrench on those inner bolts without the Subframe being lowered! The Lower Rear Torque Arms are New with newly installed bushings at the wheel carrier and UPD Tow Arms!
First off was to remove the Rear Rotors rusted to the Hubs!
Expanded View of my attempt at removing the Rusted Rear Rotors from the Hubs! However, notice the improper placement of the “gorrilla bar” within the arms of the 3 bar puller! The first Picture is what was successful as far as placement!
Installing New rear Subframe Mount
View of the New Subframe Mounts with OEM Control Arm (Old) Bushings. A “Before” View!
After View of the Newly installed and appropriately spaced within each arm KMAC PolyUrethane Bushings in each end of the Control Arms! Installing these allowed me to be able to torque them down and then check the track of the Wheel Carrier to make sure the spacing was spot on, as compared to having to wait until the car was fully weighted before doing so, which would be nearly impossible! I definitely had to make a couple adjustments with my extraction tool BTW!
Close-Up view of the KMAC (OEM Replacement) Bushings for the Rear Control Arms. Notice the Shiny metal surrounding each bushing!
Money Shot of the Final Install before the rotors and Calipers! Notice that none of the Rear AirSpring Arm Bolts are tightened just yet.
Last edited by E63007; Mar 15, 2023 at 10:29 AM.
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If you were referring to my pull to the right, no it most certainly was NOT the front Toe setting as that primarily is the only thing all “Alignment Shops” focus on. They are idiots, at least in my case, when it came to adjusting anything else. Those “Hunter” Alignment machines only, seemingly, assist with Toe Setting. I went to 3 shops. The 3rd one even tried to correct my pull to the right by adjusting my Brand New UPD Toe Arms by using a Universal Wrench, instead of a 24mm Wrench, and marred the _ _ _ T out of my Passenger Side Arm by adjusting it some +4mm (6mm total)! Crazy! It was only then when I finally took it upon myself using bbirdwell’s string method, that I only perhaps improved upon by using Calipers to measure the difference between the front and rear of the Wheel Rim after Centering and measuring from the Hubs all around.
I started with the Rear and set the Toe to 2mm of Toe-in per side. Mind you, I only aligned after getting the car absolutely Level using a Floor Laser Tool to make sure each corner was just right. Getting the front and Rear Air Springs set to the right heights is a real PITA, but absolutely necessary! Rear was +0.9 Degree (IIRC?) and front was +4 degree (IIRC?) as I, for one, do not like to intentionally lower the suspension! Also using the STAR/Xentry>Steering to adjust the wheel back to “0” after each front Toe Adjustment really helped me dial-in the Alignment! And using a Magnetic Angle Finder mounted to the rotors made adjusting Camber much easier then trying to use MATH!
For the Pull, I started with using the Crash Bolts in each of the Torque Arms and that helped. Then I inserted one into the Passenger Air Spring Arm using the OEM Adjustment Chart from Star, and that further helped but it wasn’t until the install of the 4th into the driver side Air Spring Arm when I actually experienced the pull to the Left! So I did away with that one, did a “final” alignment dialing-in the Camber slightly and “Voila!” I somehow Nailed It! It took me 3 years on and off, but I finally fixed it myself! Only thing was, the steering was a little too light as initially I had set the front Camber to around -1degree each side. But it was running dead straight for the first time ever, so I was very apprehensive about messing with it!
It wasn’t until one of the F1 Fabrication Upper Camber Arm Heim Joints had failed, fortunately realized in a parking Lot so I was able to Stop Immediately, go home and get my Jack to fix it right there in the Golf Driving Range Parking Lot and be on my way. However it was only a Temporary Fix until I got the New Heim Joints (I ordered 3!). So it was then when I decided to simply do 2 revolutions inward on the Heim Joints to adjust the Camber on each side closer to -1.7 degree and now it’s set just right as it always should have been! Perfect!
Last edited by E63007; May 18, 2024 at 08:06 PM.




Many thanks!







