Lethal Performance gets its Mustang GT track ready with a D.S.S. driveshaft and a BMR safety loop
By Steve Turner
Photos by Steve Turner and courtesy of The DriveShaft Shop
We recently showed you how Lethal Performance upgraded its 2015 Mustang GT project car with a set of rugged halfshafts from The DriveShaft Shop. That was just the first phase in bolstering the car’s drivetrain in preparation for an assault on the quarter-mile. This time around we are documenting upgrades that will improve performance and safety.
To drop some reciprocating weight and add strength, Lethal chose one of The Driveshaft Shop’s one-piece aluminum driveshaft for 2015 Mustang GT six-speed manuals (PN FDSH25-A; $854.99). The D.S.S. shaft itself is not just strong, but it features a more direct connection between the transmission and the shaft.
“What we have done is make a billet plate to eliminate the Guibo, then changed that end to a nice 1350 solid Spicer U-joint. The end is pulse-welded to the tube on the aluminum shaft and then a six-bolt CV just like the factory one,” says The DriveShaft Shop. “Why does D.S.S. use the CV and not a slider like from a 4×4? The reason is that D.S.S. high-speed balances their driveshafts and found out years ago that the CV is more stable and less likely to have Harmonic issues. Also the CV will have a much higher critical speed then a male/female slider.”
Since the new driveshaft is rated for 1,000 horsepower and tested to 9,500 rpm, Lethal doesn’t expect this unit to fail. However, it is not only better safe than sorry, but often necessary to run a driveshaft safety loop to make passes on an NHRA drag strip. As such, the Lethal camp chose one of BMR Suspension’s loops (PN DSL017; $149.95).
With that in mind, we pulled out our cameras at Power by the Hour in Boynton Beach, Florida, to document the installation of these upgrades.