The 2013/14 Shelby 1000 had the V8 engine from the 2013/14 GT500. Upgrades included a full Engine Package using a performance 850 hp fuel system with 72 lb injectors, a Borla Custom 3" stainless steel catback exhaust and new parts such as forged pistons, ported cylinder heads, titanium valve springs and titanium retainers. The engine breathes through a Kenne Bell 3.6L Supercharger using a 4.5" inlet pipe feeding an 1850cfm throttle body. A High Performance aluminium flywheel and a twin-clutch assembly is also used. The engine is estimated to produce over .