78-88 GM Metric Chassis Hobby Stock Car Frame, Front/Rear/Kit

• All new GM Metric frame sections, eliminates the need to search for & stockpile core frames
• Eliminates the need to disassemble, weld & repair core frames
• IMCA, USRA Hobby Stock and WISSOTA Street Stock approved
• Stronger, more consistent product with more performance
• Available as front, rear, or complete front/rear frame kit
• Race-ready modifications already made to frames
• Identical dimensional specs to 78-88 GM Metric frame mounting points
• .118-inch thick mild steel front frame rail sections
• .120-inch thick mild steel rear frame rail sections
• .095-inch thick 2x4 midframe rails (included with front frame and complete frame kits only)
• Front upper control arm mounts and rear spring/shock mounts included, must be finish welded
• Front and rear frames feature dimple stops and alignment holes for assembly and welding ease

Don’t Build Your Next Hobby Stock or Street Stock Car With a 30-Plus-Year-Old Frame

With the last production GM Metric chassis frame hitting the road in 1988 it is no doubt getting tougher to find a suitable chassis for a competitive Hobby Stock race car build. Rust, accident damage, and more claim these GM Metric chassis frames every day. Our IMCA and USRA Hobby Stock and WISSOTA Street Stock rules approved GM Metric chassis Hobby Stock frame is the perfect answer to your next Hobby Stock chassis build! It is available as a weld together front frame stub (with control arm/shock mounts and midframe rails included), weld together rear frame stub (with spring/shock mounts included), or complete weld together frame kit (front stub, rear stub, midframe rails, and shock mounts), perfect for Hobby Stock chassis builders.

Designed in-house at Speedway Motors, these new mild steel frame stubs solve the growing problem of trying to source good used GM Metric chassis frames for your Hobby Stock cars. These are designed around factory frame dimensions, yet most of the modifications and updates you would have to make to a stock frame are already expertly handled and approved by IMCA and USRA Hobby Stock and WISSOTA Street Stock rules. This includes shortened front and rear frame horns, front crossmember “duckbill” removed for additional steering linkage clearance, and much more! Final assembly and welding are all that is required for Hobby Stock / Street Stock chassis builders and the alignment holes and dimple stops make welding everything together quick and easy. Start your next chassis build with a Speedway Motors frame or use the front or rear stubs to update your current chassis and ditch that twisted, rusty mess of a frame you’re using now.

Benefits for the chassis builder:

• Eliminates the need to search for & stockpile core frames
• Eliminates the need to disassemble, weld & repair core frames
• No more trips to-and-from the sandblast shop
• Repeatable, easy assembly resulting in cost savings

Benefits for the racer:

• Reduced lead time from your chassis builder
• Stronger, more consistent product with more performance

Improvements over using a stock 78-88 GM Metric frame:

• Unneeded holes from the stock configuration have been removed or filled
• Bumper mounts removed
• Front and rear frame horns shortened, saving fabrication time
• Removed front crossmember duckbill for added steering linkage clearance
• Alignment holes for crossmember and lower control arm mounts for quick assembly
• Dimple stops in the frame to accept the mid rails, ensuring proper alignment

Front and rear frame fitment data:

• Front frame section features .118-inch wall thickness
• Rear frame section features .120-inch wall thickness
• Front upper control arm clamshell mounts have alignment holes and require welding
• Rear lower control arm mounts are stitch-welded, requiring full welding for installation
• Rear spring cup/upper shock mount brackets come pre-welded together (not installed)
• Midframe rails (included with front frame and complete frame) feature .095-inch 2x4 boxed construction

This frame accepts all common Hobby Stock chassis, suspension, and driveline parts, including:

• GM Metric Stock Car Racing Upper Control Arms w/Ball Joint Kit
• GM Metric G-Body Rear Control Arm Kit, Fully Assembled
• IMCA Spindle Kit w/ Wilwood Disc Brake Rotors
• 9-Inch Grand National Floater Rear End Kit with GM Metric Brackets
• GM Metric Midsize Car Roll Cage Kit

Note: NOT for street use. These frame sections are for Stock Car or Hobby Stock/Street Stock racing use only. No provisions for factory GM Metric chassis bumper mounts or other factory use is intended.