Allow Slotting of Front Subframe for Ease of Engine Installation
#30785 from Marc Cefalo · Recommended to the Board · Minutes (2021-12 Fastrack)
In GCR, Section 9.1.7.3.t., change as follows:
"t. For purposes of making engine installation easier, it is permitted to create a vertical slot between the top 2 factory mounting
holes on the driver’s side of the subframe to match the existing slot on the passenger side. The subframe is comprised of a top
and bottom layer of sheet metal. The only modifications permitted are to the top layer of sheet metal to match the bottom layer
of sheet metal which is already slotted. The slot may only connect the two existing holes and shall not exceed the width (.43”) or
height of the existing OEM holes. No material may be added.t u. NA 90-97 cars may use the OEM Mazda 99-05 (NB) model year rear uprights. NA Cars upgrading to the OEM Mazda NB rear
upright must use the NB rear upright on both sides of the car. Miss matching of rear uprights is not allowed.
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u v. On the upper control arms, the original outer mounting holes may be slotted to obtain additional camber. The max slot size
shall not exceed 0.433” X 0.600”. No material shall be added."