!!! Made on order, lead time approx. 10 days !!!

RODOBAL rod end / spherical bearing upgrade (service) available for this kit, click here

RACE front control arms with roll-center / bump steer correction -kit for BMW E30 / E30 M3 / E36 / E36 M3 / Z3 / Z3M / E46 / E46 M3 / Z4 / Z4M models (excluding E30 iX / E46 xi/xd models)

Another version of the popular kit now available! Main features:

• Standard or +30mm width (+60mm total) control arms

• 20mm roll-center correction

• 20mm bump steer correction

• Original steering ratio and Ackerman angle with no angle increase

• All new one-piece fasteners and billet castle nuts with PVD coating

• Lightweight AW-7075 aluminum tie rod extensions

• Bump steer adjustable ±5mm

• 60% weight saving compared to original cast steel arms (25% weight saving on E46 arms) most lightweight design on the market!

• Fully adjustable design: width, wheelbase (caster), anti-dive
  

• Brackets for OEM front reinforcement plate/belly pan included on E46 M3 chassis option *

• Please refer to wheel fitment chart and check compatibility with your wheel/knuckle combination
  

• Slightly reduced steering angle (not for drifting)

• Steering rack stops highly recommended

• No sway bar mounts, E30 M3 / E36 M3 / E46 strut type mounting must be used ( additional sway bar weld tabs) **

• Welding of mounting brackets required, both subframe mount and extra weld bung for the rear bracket

• E36 type tie rod inner ends must be used on all E30 applications

• E90 type longer tie rod inner ends must be used on all E46 applications and with +30mm control arm variants ***

• Rerouting of original fuel lines might be required on E30 chassis ****

• Comes with instructions and of course MRT Engineering decals

Why do you need one?

When lowering your car (BMW E30 / E36 / E46) the front end geometry goes wrong. The main purpose of the kit is to correct these geometry issues.
The extended mounting stud changes control arm pivot point vertical distance by 20mm correcting the roll-center and camber curve.
Tie rod end pivot point is also changed by 20mm in vertical direction which corrects the bump steer curve.
Perfect triangular control arm design allows very rigid, lightweight construction that in addition of all other benefits stated above, is highly desired for circuit racing applications. All control dimensions are adjustable, this also allows use of many different combinations such as spindle/knuckle swap on other chassis for example E30 5-lug swap.

Does it fit my car?

The kit can be combined with most of the E30 /E36 / E46 chassis and knuckles/spindles. See available variations:

Chassis:

• E30 non-M / E30 M3 **/****
• E36 non-M / Z3 non-M / E36 M3 / Z3M
  
• E46 non-M / Z4 non-M / Z4M ***
  
• E46 M3 */***
  

Spindle/knuckle:

• E30 non-M
• E36 / Z3 non-M
• E36 M3 3.0
• E36 M3 3.2 / Z3M
• E46 / Z4 non-M / Z4M
• E46 M3

Control arm width:

• Standard
  
• +30mm (+60mm total)
  
  

Is it easy to install?

Instructions, PDF

Assembly drawing, PDF

-with roll-center / bump steer correction -kit

Installing the kit is only recommended for enthusiasts with knowledge of car repairs and welding skills. Welding is required for both subframe mount and extra weld bung for the rear bracket.

If you need any further info please contact us!

How about the lifetime and service of the kit?

The kits have been proven on street and track applications by hundreds of our customers. We're constantly doing R&D to make the kits even better, all improvements are based on customer feedback which is very important to us.
We have proven the very same bearings with no maintenance for 20,000 kilometers, through the year, in daily use without signs of excessive wear. When the bearing life comes to an end, they're easily replaceable! Bearings are available around the world from automotive and industrial dealers and any of the spare parts can be also bought separately from us.

We want to keep our customers 100% happy thus we're only using the best materials and manufacturing processes available. CNC machined parts; arms, rods and steering adapters are made of aerospace grade AW-7075 aluminum, highest quality CrMo tool steel and Grade 5 titanium is used on control arm mounting studs and fasteners, rear brackets are TIG welded structural steel.

We use DHL Express shipping for all items. Please find your order tracking information from DHL website.