Based on the potent LS9, the LSA is a bit detuned with a slightly smaller 1.9L Eaton supercharger. The engine consists of an aluminum block, forged steel crankshaft, high-flow aluminum L92 style cylinder heads with as cast 68cc chambers, powdered metal rods and hypereutectic aluminum pistons. Make no mistake even with a small supercharger this engine is still a performer with 556 hp and 551 lb-ft of torque. What makes the LSA a little user-friendlier over the LS9 is the conventional wet-sump lubrication system. GMPP also offers an intercooler kit, which simplifies the installation even more. Smooth idle, snappy throttle response and a 6,600 rpm redline-what more can you ask for?
GM Performance Parts www.gmperformanceparts.com
Katech The 427ci Air Attack LS7 supercharged crate engine from Katech produces up to 750 hp and 700 lb-ft of flat-lined torque. Katech lays a solid foundation with a Callies forged steel crankshaft and connecting rods, plus the manufacturer's forged aluminum pistons with DLC (Diamond-Like Carbon) coated pins. It also uses a stock LS7 block with a billet steel girdle to tie the bottom end together. An upgraded camshaft designed for boost actuates the stock LS7 titanium intake valves and sodium-filled exhaust valves. Magnuson handles the compression of the air change with its M122 twin-screw, high-helix intercooled supercharger.
Katech Performance 866/528-3241 www.katechengines.com
Mast Motorsports You '10 Camaro owners can get 750-plus horsepower with a Mast Motorsports' (416ci) LS3 and L99 supercharged drop-in engine. Each engine features a forged rotating assembly with Callies crank, Callies forged H-beam rods, and Mahle forged pistons. Up top you will find CNC profiled cylinder heads with premium valvetrain components, LS3/L99 car intake, a Mast custom core single bolt or VVT supercharger profile cam and Magnuson's TVS 2300 supercharger. Each engine is test fired, rings are seated, and a dyno sheet provided . Each engine is backed by a limited 12-month, unlimited mileage warranty. Installation requires custom computer calibration (available separately from Mast) and versions are available for both the LS3 manual and L99 6-speed automatic '10 SS Camaros.
Mast Motorsports 936/560-2218 www.mastmotorsports.com
Procomp Electronics New from Procomp Electronics is this 427ci SBC that makes 550 hp and 520 lb-ft of torque. This big-inch mouse is built with all Procomp Parts, from the block to the fully CNC'd heads. The only thing Procomp is outsourcing is the pistons, which come from Probe. The engine features a 4.00-inch stroke 4340 crank, 6.00-inch H-beam rods, forged Probe pistons with 10.5:1 compression ratio, aluminum heads and full roller valve train. It also includes a 7-quart kick out sump, fabricated valve covers, pushrods, flexplate and balancer.
Procomp Electronics 909/605-1123 www.procompelectronics.com
Shafiroff Racing The UltraStreet line of high performance street engines from Shafiroff Racing now includes an all-aluminum "Real Street Lite" 427ci small-block. This lightweight powerhouse features a World Products aluminum block with splayed 4-bolt main caps, Eagle forged steel stroker crank, Eagle forged H-beam rods, Mahle custom coated 10.25-1 forged aluminum pistons, angle plug aluminum heads with stainless steel valves, and Comp Cams custom grind hydraulic roller cam. Dyno tested at 525 hp at 5,600 rpm and 550 lb-ft of torque at 4,200 rpm, this pump gas friendly engine comes with a two-year warranty.
If you are more into having a Rat under your hood, then you might want to check out the 540 RealStreet BBC from Shafiroff. This 625 hp package features a New Merlin III "Street Block" with 4 bolt mains, Eagle forged steel stroker crank and I-beam rods. It breathes through a set of 320cc runner aluminum heads with stainless valves. The engine is internally balanced and comes completely assembled with the actual dyno sheet for the engine you receive.
Shafiroff Racing 800/295-7142 www.ultrastreet.net