G80 (M3), G82 (M4), G87 (M2) S58 Motor Mounts - Poly

Below, we explain which applications each polyurethane hardness (durometer) is generally best for. The hardness of BMW OEM mounts is usually around 55A. The softest durometer we offer is our medium 70A/80A (OEM+), followed by our medium-hard 95A (Performance/Drift) and our rock-solid 75D (Race/High HP). 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 hardness. So, even though AKG mounts 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!

70A/80A (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 70A (or 80A) durometer is for you. 

Whether your stock mounts are in need of replacement or you’re just ready for a slight upgrade, our medium hardness is a good choice. Our medium compounds are engineered to retain a comfortable ride with improved performance over the stock mounts. They are designed to be stronger and last longer than factory OEM mounts, 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. 

If you’re looking to limit drivetrain movement for increased responsiveness and more effective power transfer through the drivetrain, then our 95A hardness is a good choice. Our 95A compound is engineered to deliver a significant increase in performance over stock by substantially 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 mounts, and come with a lifetime warranty.

The NVH (Noise Vibration Harshness) increase is 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. 

If you want to eliminate the movement that occurs within the drivetrain for precise responsiveness and power transfer - and you aren’t concerned with any increase in NVH, then our 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 mounts are not allowed, or for those who do not wish to deal with the issues that can arise when using aluminum mounts.

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 mount that provides virtually the same performance as a metal mount, but which isn't harsh on the chassis like aluminum mounts are. Likewise, its elasticity and memory means they are also free from deformation which cheap plastic mounts (Delrin/UHMW) are very prone to. They are the strongest and longest lasting non-metallic mounts 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 G80 (2021-current) M3 (NOT xDRIVE)
BMW G82 (2021-current) M4 (NOT xDRIVE)
BMW G87 (2023-current) M2 (NOT xDRIVE)

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.

• Premium modular poly motor mounts for BMW G80/G87! Our mounts lock the drivetrain in place, eliminating movement to increase performance.
• Made of our exclusive U.S. Mil-Spec polyurethane compound with 6061-T6 aircraft grade aluminum. Fully rebuildable design.
• The only performance mounts for BMW molded in the USA under ISO 9001:2015 certified standards - the gold standard in manufacturing.
• Each mount 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 mounts.
• Designed by leading experts in mount technology with over 40 years of BMW race prep experience.
• Easy installation with simple tools.
• Covered by our lifetime replacement warranty.

If it’s time to replace your BMW engine mounts and you’re looking for the best there is, then look no further than the original modular polyurethane mounts for BMW G80 (M3), G82 (M4), G87 (M2) with the 6-cylinder S58 engine. 

The factory rubber mounts are filled with fluid and deflect as torque moves through the drivetrain, allowing the motor and trans to move - especially once they’re worn out. Our solid, bolt-through G80 M3, G82 M4, G87 M2 poly S58 motor mounts prevent engine movement for effective power transfer through the drivetrain to the wheels. 

These bolt-through poly BMW G80, G82, G87 S58 mounts are specifically engineered to be the strongest and most reliable on the market. Our exclusive and original design incorporates the proper factory offset position necessary for a perfect fit, consists of multiple parts and is fully rebuildable for lifetime use.

NOTE: The material used for the trans mounts must be compatible with the material used for the motor mounts. Why is this?

NOTE: Passenger side motor mount must have a proper heat shield installed at all times.

Original AKG design. Learn more about Genuine AKG Parts.

Made in USA 

Replaces BMW part numbers(s): 22118097149, 22119503432