E9X 034 Motorsport Solid vs Poly Rear Subframe Insert

[tan_rich]

Hi All,

Has anyone tried to 034 Motorsport billet aluminum rear subframe insert. 034 Motorsports seems to have a great following in the Audi/VW scene and their billet subframe inserts seems to have great reviews there. Wondering if anyone on our platform has tried these and if they are better than poly inserts. I.E Power Flex Black Series or the fairly inexpensive WhiteLine inserts.

I know full solid bushings are better than inserts in general however if a billet aluminum insert can be done for 80% performance with 20% of the work. I am willing to do these. However it seems like on the poly bushings they have the legs hat seems to connect the top and bottom of the bushing to make it kinda one piece while the 034 ones just sit on the top and bottom of the bushing.

Any insight on this would be great.

https://store.034motorsport.com/billet-aluminum-rear-subframe-mount-insert-kit-e9x-bmw.html

 

[Torgus]

Solid aluminum mounts are 300. If you need them get the right thing imo. Not very pricey all things considered. Should have been solid from the factory if you ask me.

I am very skeptical of all those insert types and how functional they are.

 

[tan_rich]

It’s not really the cost, more of the work that needs to be done. Inserts are quick and easy, solid mounts not so much... nor do I have the tools to correct press in solid aluminum ones...

 

[saskatchewan135]

It’s not really the cost, more of the work that needs to be done. Inserts are quick and easy, solid mounts not so much... nor do I have the tools to correct press in solid aluminum ones...

i would atleast do the two piece whitelines, they are easy to install with the subframe in the car

 

[tan_rich]

i would atleast do the two piece whitelines, they are easy to install with the subframe in the car

Hmm yeah those don’t look too bad either.

 

[tan_rich]

Stopped being lazy and ordered AKG poly 75D poly bushings and making a custom bushing removal tool. Aluminum ones seemed too difficult for to put in without removing the subframe

 

[silverstreak18]

FWIW 034 Motorsports does not have a great following so far with the E9x chassis. Lots of very low mileage failures with their motor mounts.

 

[Asbjorn]

Just want to comment that on the E89 platform poly inserts don't even compare to solid subframe mounts. They are not 80% of the performance for 20% the effort. They are more like 10% of the performance.
But solid mounts do come with a bit of extra nvh from exhaust, diff, road etc on E89s...

 

[Rob09msport]

i would atleast do the two piece whitelines, they are easy to install with the subframe in the car

I have white lines to and their great

 

[tsaulsbu]

Good call on the AKG 75D rear subframe bushings. The OEM bushings come out easily with this tool - no need to make your own. And, if you use dry ice, the AKG bushings don't even need to be pressed in. It's a straightforward task on jack stands, and the 75D poly is insanely firm. As folks have reported (with both the 75D and w/ aluminum bushings), there's no change in NVH.