Adapter to install the late model aluminum master cylinder onto Mopar vehicles which have four mounting holes in the firewall. This adapter has four pressed in studs which secure the adapter to the firewall. On the front side there are two pressed in studs which hold the new aluminum master cylinder in place. A standard manual brake pushrod will work with this adapter, or an adjustable pushrod can be ordered from Mancini Racing. The AR318 heat shield is optional.