E9X 034 Motorsport Solid vs Poly Rear Subframe Insert

tan_rich

Specialist
Feb 6, 2018
89
18
0
Ride
335is
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

Brigadier General
Nov 6, 2016
2,671
2,194
0
Boston
Ride
ACF 6466 E92 + METH
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

Specialist
Feb 6, 2018
89
18
0
Ride
335is
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...
 

tan_rich

Specialist
Feb 6, 2018
89
18
0
Ride
335is
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
 

Asbjorn

Lieutenant
Mar 10, 2018
854
602
0
European, based in China
Ride
Z4 N54 DCT
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...
 
  • Informative
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tsaulsbu

Lurker
Mar 16, 2017
23
4
0
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.
 
  • Agree
Reactions: Torgus