The rear lower control arms on E82/E9X models are the weakest link in the rear suspension. The arm is made from folded sheetmetal and it bends and deforms easily. Not only will it deform from potholes and curbs, tow truck drivers love to hook onto them without realizing how weak they are. We have seen other race teams complete the box section to make them stronger. A bent arm will throw off the geometry in the suspension, potentially affecting handling and tire wear. These aluminum arms are both lighter and stronger than the factory sheetmetal arms and is the best solution for chronic bending of the stock arm. These are a direct replacement to your stock arms with no changes needed to your alignment. New high-grade hardware is included.

Note: the stock arm is designed from the factory to be intentionally weak. These arms will bend so that something else in the suspension does not break. Our race cars used the stock sheetmetal arm but we replaced them often. We found that it was better to finish a race with a bent arm than not finish due to a catastrophic failure. The ECS arms are still designed to be the weakest link but are far stronger than the factory arm and will not bend as easily.

This item fits the following BMWs:

2008-2013 E82 E88 BMW 128i 135i 1M Coupe
2006-2011 E90 BMW 325i 325xi 328i 328xi 330i 330xi 335i 335xi M3 - Sedan
2007-2011 E91 BMW 325i 325xi 328i 328xi - Touring Wagon
2007-2013 E92 BMW 328i 328xi 335i 335is 335xi M3 - Coupe
2007-2013 E93 BMW 328i 335i 335is M3 - Convertible

Fine-tuning your coilover damping shouldn’t mean stripping out your rear seats or interior panels. On many applications, rear shock adjusters are hidden behind carpet, trim, or seatbacks, making quick adjustments a hassle.

The ECS Rear Damping Extension Kit solves that problem with a clean and functional solution. These flexible extensions relocate the adjustment knobs to an easily accessible point above the rear shock towers, letting you dial in your suspension from inside the cabin, no disassembly required.

Installation is straightforward: simply drill a small access hole in your interior trim and route the extension cables through. The adjustment knobs can be removed to allow the line to pass through smaller openings, minimizing cutting. For proper installation, be sure to fully loosen the set screw, insert the cable, then securely tighten it using the provided Allen key.

Kit Includes:

(2) Rear damping adjuster extension cables

Installation hardware and Allen key

A smart upgrade for track cars, daily drivers, or anyone who values easy access to suspension tuning, without compromising interior fit and finish.

• 52% stiffer than the factory E90/E92 M3 bar. 42% stiffer than the E93 M3 bar!
• 27mm straight across (not a tapered center like the E93 M3 factory bar)
• Solid core, not hollow like the stock bars (better at resisting twist)
• Forged, non-adjustable steel ends
• Highest tensile steel strength available

The H&R for the E9X M3 is the best anti-roll bar option for the E9X M3. Don't be let down by the "small" size compared to the factory sway bar sizes - there are some big differences! We've had our in-house suspension engineers run the math and the H&R swaybar is over 52% stiffer than the factory E90/E92 M3 bar and even over 42% stiffer than the E93 M3 sway bar upgrade. There are several reasons for this - the stock sway bars are hollow (for lighter weight) and will twist more than the solid H&R bar. Also, the E93 M3 bar is often called a 28mm bar but it actually tapers down in the center to 24mm which greatly reduces its effectiveness. So if you're looking for a serious sway bar upgrade, the H&R is clearly the way to go. Note: to maintain the handling balance of the car, we recommend only using the front bar with the matching H&R rear bar or heavily revised racing suspension.

For a more in-depth analysis of the E9X front sway bar differences, check out our FAQ!

This bar re-uses the factory M3 sway bar bushings and brackets.

This item fits the following BMWs:
2011+ E82 BMW 1M Coupe
2008+ E90 BMW M3
2008+ E92 BMW M3

The same ride height as the standard H&R Sport springs but with a stiffer spring rate geared even more towards track performance. Fits all 2008+ E90 M3 sedan and E92 M3 coupe, with AND without electronic dampening control (EDC).

After thousands of street and track miles in our own 2008 M3 sedan project car (the white car pictured), we loved the way the "standard" H&R Sport Springs felt on both the street and track. Since the ride was so compliant on the street (even with 20" wheels), we felt some M3 owners might want to sacrifice some of the street ride quality for an even firmer spring rate that would handle even BETTER on the track. We asked, and H&R delivered -- and the H&R Sport PLUS springs for the E9x M3 were the answer. The same "ideal" ride height with a more aggressive spring rate that is still tolerable on the street (though not as forgiving as the standard H&R Sport springs) and more at home on the track.

M3 with Stock BMW Suspension
Front Lowering 1.0"
Rear Lowering 0.6"

M3 with Competition Package
Front Lowering 0.75"
Rear Lowering 0.25"

This item fits the following BMWs:
2008-2011 E90 BMW M3
2008-2013 E92 BMW M3

Upgrade your BMW's suspension with BMW E8X E9X Replacement Bushings.

Engineered for durability and performance, these bushings provide improved handling and responsiveness. Specifically designed for BMW E8X and E9X models, they ensure a precise fit and reliable performance. Reduce vibrations and enhance driving comfort with these high-quality replacement bushings.

• Improved handling and responsiveness
• Specifically designed for BMW E8X and E9X models
• Precise fit for reliable performance
• Reduces vibrations for enhanced driving comfort
• High-quality construction for durability