Mazda RX-7 Subframe Cross Member for Sale

About the Mazda RX-7 Subframe Cross Member

The crossmember is the structural spine under the RX-7's nose: it ties the chassis rails together, carries the engine mounts that locate the rotary, anchors suspension and steering components, and feeds wheel and drivetrain loads evenly into the frame. This unit is precision-welded high-tensile steel with 3.2 mm main support sections, reinforced at the high-stress load points, treated against corrosion, and built to take OEM bushings, mounts, and fasteners in a direct bolt-on installation.

Why RX-7 Owners Replace the Cross Member

Signs include rust perforation, frame cracking, suspension misalignment that no adjustment cures, and clunking from underneath. On a chassis now well past forty years old, corrosion is the chief enemy; a crossmember that has thinned or cracked compromises handling and safety, and welding patches into a load-bearing structure is a poor second to a sound original.

Things to Confirm Before Ordering

• Your RX-7 generation; this donor is a 1979 first-generation (SA/FB) car
• Condition of your bushings and mounts, which are not included
• Access plan: most installations need partial engine or suspension disassembly
• An alignment appointment after installation, since suspension geometry resets with the new structure

What Is Included, What Is Not Included

Detail Description

INCLUDED The subframe cross member as a bare frame. NOT INCLUDED Bushings, mounts, and fasteners, which are reused or replaced separately; engine brackets and steering components. Tools You Need Standard hand tools, jack stands or a lift, and support equipment for the engine during the swap; a wheel alignment afterward.

Vehicle Compatibility

Detail Description

Mazda RX-7 first generation (SA/FB, 1979 to 1985) Direct application, donor generation Mazda RX-7 FC (1986 to 1991) Different subframe, not interchangeable; call for availability Mazda RX-7 FD (1993 to 1995 US) Different subframe, not interchangeable; call for availability

Donor Reference 1979 Mazda RX-7

Fitment Assistance

Call (240) 301-0095 with your year and generation. We confirm the first-generation match, or check inventory for FC and FD crossmembers, and talk through the bushing and mount plan before the order ships.

Condition and Inspection

This is a used structural part, inspected before shipping:

• All welds inspected for cracks and fatigue
• Sections checked for rust perforation and thinning
• Engine mount and suspension points verified straight
• Bolt holes checked round, no elongation
• Photos provided before purchase

Why Buy from Us

• Weld and rust inspection on a part where structure is everything
• Generation match enforced across the three RX-7 chassis
• Sound first-gen crossmembers are finite and getting rarer
• 30% off shipping to all 50 states, no hidden fees
• No core charge
• 15 day replacement warranty