1979-1993 Ford Mustang Billet Aluminum Crossmember

1979-1993 Ford Mustang Billet Aluminum Crossmember


Model: RCMFBssm

1979-1993 Ford Mustang Billet Aluminum Crossmember

This billet aluminum transmission crossmember provides unique styling with the strength of billet. Designed as a direct replacement for 1979-1993 fox bodies, it also provides clearance for dual exhaust systems. There is no welding with the Southside Machine design, and transmission locations are secured by self-locking stainless steel sets. The billet aluminum construction eliminates EM style “spongy” rubber inserts, and bolts in solid for a chassis stiffening assembly. This crossmember provides a level of function that is equal to it’s great looks and styling.

(direct bolt-in for vehicles built since 1982 with a 4-1/2″ dimension between the crossmember mounting brackets. Earlier vehicles with the 2-3/4″ dimension are accommodated by relocating the brackets.)

purchase transmission mount separately. p/n FMTM.

purchase crossmember bolts separately. p/n RCMFB-boltkit

p/n RCMFB installation notes:

1: the RCMFB crossmember is installed with the taller exhaust clearance hump on the passenger side of the vehicle.

2: – – important note: – – the RCMFB requires an aftermarket transmission mount that utilizes bolts rather than studs. The Southside  Machine Performance transmission mount p/n FMTM is shipped with longer bolts to accommodate the billet crossmember construction.

3: also fits these fox body vehicles:

  • 1978-1983 Ford Fairmont & future, (1978-1981 have 2-3/4″ brackets)
  • 1978-1983 Mercury zephyr, (1978-1981 have 2-3/4″ brackets)
  • 1979-1993 Ford Mustang, (1979-1981 have 2-3/4″ brackets)
  • 1979-1986 Mercury capri, (1979-1981 have 2-3/4″ brackets)
  • 1980-1988 Ford Thunderbird
  • 1980-1988 Mercury Cougar
  • 1980-1981 Ford Durango
  • 1981-1982 Ford granada, (2-3/4″ brackets)
  • 1983-1986 Ford ltd, fox chassis
  • 1983-1986 Mercury marquis, fox chassis

Additional information

Weight 8 lbs
Dimensions 4 x 4 x 29 in
Ford Models

Product Years Individual

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Product Years Abbreviated

Product Years


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