E30 Rear Subframe & Diff Bushing Kit (Poly)

Below, we explain which applications each polyurethane hardness (durometer) is generally best for. The hardness of BMW OEM bushings is usually around 55A. The softest durometer we offer is our medium 85A (OEM+), followed by our medium-hard 95A (Performance/Drift) and our rock-solid 75D (Race). If you need further help determining which hardness is right for you and your build, please contact us.  

• NOTE: Hardness alone is not an indicator of either the quality or the performance capability of a part, and should not be relied upon as a specification by itself. There are many compounds with very different quality and performance characteristics that can be produced at the same durometer. So, even though AKG bushings may have the same relative hardness as those sold elsewhere, the chemical structure of the raw materials and the manufacturing process is completely different. The quality of our polyurethane is so much better than anything else available, you can actually see and feel the difference for yourself!

85A (Medium Compound) | OEM+
If you have a predominantly street driven car (with minor performance modifications) and are looking for that OEM+ feeling, then our medium 85A durometer is for you. 

Whether your stock bushings are in need of replacement or you’re just ready for a slight upgrade, 85A hardness is a good choice. Our 85A compound is engineered to retain a comfortable ride with slightly improved performance over the stock bushings. They are designed to be stronger and last longer than factory OEM bushings, and come with a lifetime warranty.

The NVH (Noise Vibration Harshness) increase is minimal (everyone’s perception of NVH is different and this is only a guide).

95A (Medium-Hard Compound) | Performance & Drift
If you have a more performance-focused “dual-duty” track or drift build that still sees street use and are looking for a considerable increase in performance, then our medium-hard 95A durometer is for you. 

Whether you’re looking to achieve faster laps at the track or more precise angle stability while drifting, 95A hardness is a good choice. Our 95A compound is engineered to deliver a significant increase in performance over stock by drastically decreasing deflection (movement) - while at the same time providing as much of a comfortable ride as possible during normal driving. They are designed to be stronger and last longer than factory OEM bushings, and come with a lifetime warranty.

The NVH (Noise Vibration Harshness) increase is minimal to moderate (everyone’s perception of NVH is different and this is only a guide).

75D (Hard Compound) | Race & High Horsepower
If you have a purpose-built race or drift car, and are looking for the maximum possible performance available, then our rock-hard, race-proven 75D compound is for you. This is also the proper compound for high-horsepower and/or big-grip cars. 

For those that want to eliminate the movement (deflection) that occurs with the stock bushings to maintain precise suspension geometry for exceptional handling and responsiveness - and you aren’t concerned with any increase in NVH, 75D hardness is a good choice. Our 75D compound is specifically engineered to be the strongest and most durable non-metallic compound available. It is the best option for race classes where metal bushings are not allowed, or for those who do not wish to deal with the issues that can arise when using metal bushings.

Our U.S. Military Spec 75D compound is as hard as a bowling ball, yet has elasticity and memory. This exclusive compound allows us to manufacture a bushing that provides virtually the same performance as a metal bushing, but which isn't harsh on the chassis like metal bushings are. Likewise, its elasticity and memory means they are also free from deformation which cheap plastic bushings (Delrin/UHMW) are very prone to. They are the strongest and longest lasting non-metallic bushings available and come with a lifetime warranty.

The NVH (Noise Vibration Harshness) increase is moderate to high (everyone’s perception of NVH is different and this is only a guide).

BMW E30 (1986-1991) 318, 323, 325, M3

Shipping: Enjoy fast shipping. In stock orders ship within 24 business hours from Illinois, USA. We ship worldwide. For more info and transit times, click here.

Returns: 60 day hassle-free returns with no restocking fees. Products must be in their new, original uninstalled condition and in their original packaging. For full details, click here.

Warranty: All of our parts come with a lifetime warranty. Products are warranted as long as the part is in the car in which it was originally, properly installed. For full details, click here.

• The ORIGINAL poly subframe & diff bushings for BMW E30! Our designs locks the subframe & diff in place, eliminating movement along their axes to increase performance.
• Made of our exclusive U.S. Mil-Spec polyurethane compound with 6061-T6 aircraft grade aluminum sleeves.
• The only performance bushings for BMW molded in the USA under ISO 9001:2015 certified standards - the gold standard in manufacturing.
• Each bushing is precision molded and then CNC finished in small batches for a perfect fit.
• Stronger and more durable than the competition. Our proprietary raw stock poly costs up to 5X the cheap stuff used by the other guys.
• Engineered & manufactured to out last & out perform any other OEM or aftermarket bushings.
• Designed by leading experts in bushing technology with over 40 years of BMW race prep experience.
• Easy installation with simple tools.
• Covered by our lifetime replacement warranty.

Our BMW E30 rear subframe & diff bushing kit comes complete with matching subframe and diff bushings in a simple kit. We offer multiple hardness options that cover everything from an OEM+ build to a purpose built racecar. 

These are the original two-piece encapsulating E30 subframe bushings, so you know they're the best. The stock rubber bushings are intentionally designed to deflect (move/twist), which is great for comfort and noise reduction, but not great for performance. Our unique polyurethane E30 bushings replace the factory bushings with ones that lock the subframe in place - preventing it from moving. Matching these subframe bushings with our diff bushing will drastically improve handling characteristics, while also increasing the ability of the car to transfer power to the wheels. 

Kit includes two E30 subframe bushings and one diff mount bushing.

Original AKG design. Learn more about Genuine AKG Parts.

Made in USA 

Replaces BMW part numbers(s): 33171135242, 33171128586, 33172228425, 33171124373, 33171090950, 33311130537, 33311129144, 33331126747