Progressive Automotive offers Hot Rod, Street rod and truck frame boxing plates that are CNC cut from 10-gauge (.135) steel. These boxing plates provide added strength and reinforcement to the frame rails.
The full boxing plates are cut into four pieces per frame rail for the lowest shipping cost possible.
For those looking for partial boxing plates, Progressive Automotive offers front and rear options. The front partial boxing plates are designed to box the chassis in critical areas such as front suspension attachment points and motor mount placements. They typically start approximately 6″ ahead of the Front Axle Center Line and extend 20″ behind it.
Similarly, the rear partial boxing plates start where the rear suspensions attach and extend to where the shock/coil-over/air ride mounting cross members are located. They generally start approximately 20″ ahead of the Rear Axle Center Line and extend 6″ behind it.
Boxing plates are non-refundable, but Progressive Automotive offers the option to exchange them for custom cut boxing plates based on a provided template.
Progressive Automotive takes pride in manufacturing their products at their shop in Baltimore, Ohio, U.S.A. emphasizing their commitment to quality and craftsmanship.

Chevy:
1931-32 car & 31-33 truck
Full Boxing set FL-CA $489
Partial Front Boxing, 26″ long IFS-32C-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CA-BP $129/pr.
1933 Master
Full Boxing set FL-CB $489
Partial Front Boxing, 26″ long IFS-33M-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CB-BP $129/pr.
1934-35 Standard car
Full Boxing set FL-CD $489
Partial Front Boxing, 26″ long IFS-34S-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CD-BP $129/pr.
1934 Master car
Full Boxing set FL-CC $489
Partial Front Boxing, 26″ long IFS-34M-BPC $129/pr.
Partial Rear Boxing, 26″ long RS-CC-BP $129/pr.
1935 Master / 1936 Standard car
Full Boxing set FL-CE $489
Partial Front Boxing, 26″ long IFS-35M-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CE-BP $129/pr.
1934-36 truck (1/2 ton, Short bed type)
Full Boxing set FL-CTB $489
Partial Front Boxing, 26″ long IFS-34T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CTB-BP $129/pr.
1937-40 truck (1/2 ton, Short bed type)
Full Boxing set, 1/2 ton, Short bed type FL-CTC $489
Full Boxing set, 3/4 ton, Long bed type FL-CTC-L $549
Partial Front Boxing, 26″ long IFS-37T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CTC-BP $129/pr.
1941-46 truck
Full Boxing set, 1/2 ton, Short bed type FL-CTD $489
Full Boxing set, 3/4 ton, Long bed type, with customer provided template FL-CTD-L $549
Partial Front Boxing, 26″ long IFS-41T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CTD-BP $129/pr.
1947-53 truck
Full Boxing set, 1/2 ton, Short bed, Start 12 7/8″ from the front, ends 12 5/8″ from rear FL-CTE $489
Full Boxing set, 3/4 ton, Long bed type, with customer provided template FL-CTE-L $549
Partial Front Boxing, 26″ long IFS-47T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CTE-BP $129/pr.
1954-55 (1st Series) truck
Full Boxing set, 1/2 ton, Short bed type, Start 12 7/8″ from the front, ends 12 5/8″ from rear FL-CTEE $489
Full Boxing set, 3/4 ton, Long bed type, with customer provided template FL-CTEE-L $549
Partial Front Boxing, 26″ long IFS-47T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CTEE-BP $129/pr.
1955 (2nd Series)-59 truck
Full Boxing set, 1/2 ton, Short bed, Start 2″ from the front, ends 9 3/8″ from rear FL-CTF $489
Full Boxing set, 3/4 ton, Long bed, with customer provided template FL-CTF-L $549
Partial Front Boxing, 26″ long IFS-55T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-CTF-BP $129/pr.
1963-66 C-series truck
Full Boxing set, Short bed (6 1/2′), Starts at front crossmember, ends at rear crossmember FL-CTH $489
Full Boxing set, Long bed (8′), Starts at front crossmember, ends at rear crossmember FL-CTH-L $549
Partial Front Boxing, 26″ long IFS-63T-BP $129/pr.
Partial Rear Short Bed Boxing, 26″ long RS-CTH-BP $129/pr.
1973-87 C-series truck
Full Boxing set, Short bed, Starts at front crossmember, ends at rear crossmember FL-CTJ $489
Full Boxing set, Long bed, with customer provided template FL-CTJ-L $549
Partial Front Boxing, 26″ long IFS-73T-BP $129/pr.
Partial Short Bed Rear Boxing, 26″ long RS-CTJ-BP $129/pr.
Fords:
1932 car & 1932-33 (1st Series) truck
Full Boxing set FL-FB $489
Partial Front Boxing, 26″ long IFS-32F-BP $129/pr.
Partial Rear Boxing, 26″ long RS-FB-BP $129/pr.
1933-34 car & 1933 (2nd Series)-34 truck
Full Boxing set FL-FC $489
Partial Front Boxing, 26″ long IFS-34F-BP $129/pr.
Partial Rear Boxing, 26″ long RS-FC-BP $129/pr.
1935-40 car & 1935-41 truck
Full Boxing set FL-FD $489
Partial Front Boxing, 26″ long IFS-35F-BP $129/pr.
Partial Rear Boxing, 26″ long RS-FD-BP $129/pr.
1941-48 Ford
Full Boxing set FL-FE $489
Partial Front Boxing, 26″ long IFS-41F-BP $129/pr.
Partial Rear Boxing, 26″ long RS-FE-BP $129/pr.
1942-47 Ford truck
Full Boxing set, 1/2 ton, Short bed type FL-FTE $489
Full Boxing set, 3/4 ton, Long bed type, with customer provided template FL-FTE-L $549
Partial Front Boxing, 26″ long IFS-42T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-FTE-BP $129/pr.
1948-52 Ford truck
Full Boxing set, 1/2 ton, Short bed, Start 7″ from the front, ends 7″ from rear FL-FTF $489
Full Boxing set, 3/4 ton, Long bed, with customer provided template FL-FTF-L $549
Partial Front Boxing, 26″ long IFS-48T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-FTF-BP $129/pr.
1953-56 Ford truck
Full Boxing set, 1/2 ton, Short bed FL-FTG $489
Full Boxing set, 3/4 ton, Long bed type, with customer provided template FL-FTG-L $549
Partial Front Boxing, 26″ long IFS-53T-BP $129/pr.
Partial Rear Boxing, 26″ long RS-FTG-BP $129/pr.