Key Features
- Custom-molded fiberglass insert engineered specifically for TREMEC T56 Magnum 6-speed conversions in C3 Corvettes
- Provides necessary clearance for the larger T56 case dimensions that OE tunnels cannot accommodate
- Small-lot production ensures quality control and precise fitment
- Eliminates complex cutting and fabrication typically required for 6-speed swaps
- Designed and manufactured by Dynamic Corvettes
- 100% made in the USA
Description
The TREMEC T56 Magnum 6-speed transmission is simply too big to fit into an OE C3 Corvette tunnel. The Magnum's larger case dimensions, greater overall length, and rearward-shifted mounting points make it incompatible with the factory tunnel geometry designed for 3- and 4-speed transmissions. Factor in header clearance and proper shifter positioning, and you're looking at extensive metalwork—unless you have a purpose-built solution.
This fiberglass transmission tunnel insert from Dynamic Corvettes solves the clearance problem without requiring you to cut and fab your factory tunnel. Engineered specifically for C3 Corvettes undergoing T56 Magnum conversions, this insert provides the additional volume needed for the transmission case, shifter mechanism, and surrounding driveline components. The small-lot molding process ensures consistent quality and accurate fitment across all 1968-1982 C3 applications.
Rather than spending hours with a cutoff wheel and body filler attempting custom tunnel modifications—a process prone to fitment issues and structural compromises—this insert drops into place and delivers the precise clearances your 6-speed swap demands. The result is a cleaner installation, faster build time, and a professional finished appearance under the console.
Fits all 1968-1982 C3 Corvettes receiving TREMEC T56 or T56 Magnum 6-speed transmission upgrades. Made in the USA.
Kit Includes
- One molded fiberglass transmission tunnel insert
- Lifetime technical support