The car is a Z06 so it has the LS7. The twin turbo set-up was done by Lingenfelter. They don't sell a kit for this. The package includes JE forged pistons, Callies forged steel crank, Manley forged rods, stainless steel valves, balanced rotating assembly, blueprinted engine, fuel injectors and high capacity fuel system, port matched LS7 intake, ported and polished throttle body, twin Garrett BB turbos with integral waste gates, twin intercoolers, custom stainless steel 4 into 1 exhaust manifolds & turbo outlets, turbo scavenge pump & turbo oil drain reservoir, oil cooler, dual 4" Corsa stainless steel cat back exhaust, Exedy twin disc clutch and aluminum flywheel. With all this they give a 3 year warantee.
The package does 700 rwhp with peak power about 1000 rpm lower than stock. The thing is an absolute beast. It'll light the tires at 130 mph. At 190 mph it still pulling hard (that's when I chickened out) and is still increadibly stable.
The car is currenty getting a RPM Level V ZR1 (close ratio 6060) tranny and diff (c/w a Quaff posi), DSS 1000hp axles, a DSS propeller shaft and a SFI bellhousing.