This rear lower suspension mount is manufactured for ARRMA platforms from 7075-T6 aluminium and fitted with brass inserts at the hinge-pin seats to improve fit and durability. The part is aimed at the rear gearbox zone to reduce flex at the lower arm pivot and keep suspension geometry steady under heavy use.
The unit replaces the OEM part AR330379 and comes with the hardware listed below. The aluminium construction increases wear resistance compared with standard stamped parts, and the brass inserts give a harder wearing bearing surface for the hinge pins, cutting slop without making the part brittle.
Fitting notes: the mount locates in the rear lower suspension position on compatible ARRMA 1/8 and selected 1/7 6S models. Use the supplied grade 12.9 black flat head screws for a secure install and check arm alignment and hinge-pin retention after fitting. This is a chassis-level upgrade intended to stabilise suspension response rather than alter baseline geometry.
For builders and tuners working on ARRMA 6S models, this GPM rear lower suspension mount provides a direct aluminium upgrade aimed at reducing hinge-pin play and stabilising the rear lower arm under load; fit with the supplied hardware and confirm alignment post-install.
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