assembly of the engine they purchased – from installing the crankshaft in the cylinder block to topping off the engine with its intake system. In the case of the LS9, it also means installing the supercharger assembly. Upon completion, a personalized nameplate is added to the engine. The build-your-own engine program associated with the V8 engines, available for buyers of Chevrolet Corvette, Cadillac XLR, and certain top-spec Chevrolet Camaro models, were temporarily halted after the closure of GM Performance Build Center in Wixom, Michigan. The program's venue was reported to be relocated to the Corvette assembly plant in Bowling Green, Kentucky. Aftermarket LS7.R The LS7.R engine is a variation of the LS7 used in the highly successful C6.R American Le Mans Series racecar. It was crowned as Global Motorsport Engine of the year by a jury of 50 race engine engineers on the Professional Motorsport World Expo 2006 in Cologne, Germany. LSX LSx is also used to denote any LS engine. At the 2006 SEMA show, GM Performance Parts introduced the LSX engine, an all-new cast-iron racing block based on the LS7 engine. It was designed with help from drag racing legend Warren Johnson. It offers displacements ranging from with a bore x stroke of and is capable of withstanding . This block incorporates two extra rows of head-bolt holes per bank for increased clamping capacity. The six bolt steel main caps are the same ones used on the LS7 engine. The engine debuted at the auto show in a customized 1969 Camaro owned by Reggie Jackson. The LSX was available starting the second quarter of 2007, set to be available in authorized dealerships and retailers on March 31, 2007. The Hennessey Venom GT also uses the LSX engine based on LS7. Chevrolet Performance LSX Bowtie block includes LSX specific six-bolts-per-cylinder head bolt pattern, billet-steel six-bolt dowel-located main bearing caps, extra-thick deck for maximum clamping force, extra-thick cylinder walls allow increased bore capacity (maximum bore still allows minimum wall thickness), true priority main oiling system, main web bay-to-bay breathing holes reduce crank windage, orange powder coat finish, machined bore at is ready for final boring/honing. A version engineered by Ilmor is used in NASCAR for the Craftsman Truck Series and the ARCA Racing Series as an option engine. Most teams in both series (known as "NT1" in the Truck Series and the "ARCA 396" in ARCA) have switched to the