1955-57 HRD Chevy Enlarged Transmission Tunnel 

• Custom New Steel 16-Gauge Tunnel

• Comes Fully Formed, Welded And Ready To Install

• Enlarged Nearly 2" To Allow Easy Installation Of GM 6L80, 6L90 And Tremec T-56 Transmissions

• Designed For Use With Our Recessed Firewalls RFW-56 Or RFW-57

• Requires Cutting, Welding And Fabrication Skills To Install