IRS Aluminum Subframe Support Bushings

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Has anyone herd or used aluminum bushing in a IRS subframe support. I know the best replacement is FTB kit. But I came across someone sell these for the cobra IRS. and was thinking of picking them up. But just never see or heard of anyone use aluminum ones. Just wnt to get some opinions and thoughts on these.
Thanks

 

[br549]

use delirn (sp) from fulltiltboogieracing.com

 

[Black306]

Kenny Brown sold a set of solid IRS subframe bushings at one time. If given a choice, I'd do the solid mounts. There is no reason for any kind of deflection on the IRS subframe. It would be like putting rubber/delrin bushings on a K member; it's not needed.

So if you found someone selling solid bushings, please let me know. :beer:

 

[br549]

Delrin is not compressible material ala "rubber". Go to Fulltilt and you will find your support bushings.