The stock T56 trans was sent out to RPM Transmissions for its Level V treatment, which includes a steel 3-4 shift fork, modified 1-2 fork, micro polished internals, and bronze fork pads. When combined with a SPEC Stage 3+ clutch, pressure plate, and flywheel, little was left to chance in the drivetrain. Just to be safe, EPP fabricated a set of subframe connectors from mild steel to reinforce the chassis, since there were no aftermarket pieces available. Thankfully the stock Brembo four-piston brakes are quite stout-so even with the type of scary acceleration the V is now capable of, they can still keep up. The factory 18x8.5 wheels have been traded for stock-sized HREs up front and rears that have been widened to 9.5 inches in order to stuff a 285/35R18 Nitto drag radial into the wheelwell.
From the exterior, this CTS-V looks quite docile, but a fierce animal waits to be unleashed with every shift of the RPM-built T56 trans. A SPEC Stage 3+ clutch was necessary to hold up to the blown 402. The chassis is reinforced by mild steel subframe connectors (fabricated by EPP), and the suspension enhanced by HAL/QA1 shocks at all four corners.
Unfortunately, even with the meaty Nittos, there is no possibility of traction with a dyno-verified 809 hp and 752 lb-ft of torque on pump gas with Alkycontrol methanol injection. Even at highway speeds, full throttle input in virtually any gear makes this beast feel like it's on ice. But, believe or not, Bob still wants more. Plans are to swap out the ATI Performance balancer for a larger unit from ASP in order to crank up the boost to 18-19 psi. EPP says this will most likely necessitate a set of Delphi 95-lb/hr low-impedance injectors and drivers to work with the stock computer. But first, Bob has scheduled some time with Madman & Co. Racing for a 9-inch rear upgrade to finally alleviate the vibration in his 8.8 that has claimed three driveshafts, a carrier bearing, and more money and patience than he'd care to remember. It's hard to imagine a stouter sedan than this, but apparently Bob has.