The 427 cubic-inch displacement (4.125-inch bore; 4.000-inch stroke) engine produces up to 750 horsepower and 700 ft.-lbs. of massive stump-pulling, flat-lined torque.  Katech lays a solid foundation with Callies forged steel crankshaft and connecting rods plus the manufacturer's forged aluminum pistons with DLC (Diamond-Like Carbon) coated pins.  They use a stock LS7 block with a billet steel girdle to tie the bottom end together.

"Our Air Attack LS7 SC delivers extreme forced-induction performance for the LS7 engine in off-road and hot-rodding applications," said Caleb Newman, vice president, director aftermarket operations, Katech Performance.  "Because we are producing 50 percent more power - far beyond what the cast production piston was designed for - our Katech forged pistons were a must in the Air Attack LS7 SC to maintain engine life and enable even greater boost levels."  

An upgraded camshaft designed for boost actuates the stock LS7 titanium intake valve and sodium-filled exhaust valves.  Magnuson handles the compression of the air change with their M122 twin-screw high-helix intercooled supercharger.  In addition to the standard features, optional Katech valve covers and TVS-based superchargers are also available.

The engine is one of five that make up Katech Performance's LS7 "Arsenal" that includes a "Street Attack" LS7 7.0L, "Sneak Attack" LS7 5.7L, "Desert Attack" LS7 7.0L and "Track Attack" LS7 7.0L option.  Each engine is completely disassembled, blueprinted and enhanced by the same technicians that produce championship winning engines for all Katech race programs.

Since 1977, Katech has captured more than 50 driver's and manufacturer's championships competing in the world's most prestigious racing leagues, including the SCCA SPEED World Challenge, American Speed Association (ASA), International Motor Sports Association (IMSA), American Le Mans Series (ALMS) and NASCAR(r).      

For more information or to request a catalog, call 866-KATECH1 or visit Katech Performance online at www.katechengines.com.

Katech Performance, the aftermarket performance division of Katech Inc., engineers and manufactures race-proven crate engines and components for LS1/LS6 and LS2/LS7 engines including solid belt tensioners, coil relocation brackets, cylinder heads, dampers, pistons, push rods, throttle bodies and valve covers, among other high-performance products for the street and track.

Katech Inc. was founded on the need to provide responsive service and skills to factory race efforts in all forms of racing, including the SCCA SPEED World Challenge GT, NASCAR and the American Le Mans Series.  Today, Katech is an industrial leader in advanced racing and high-performance engine development, manufacturing, testing and assembly, and offers support services for the professional racer including boring, honing, fabrication, welding and prototype parts development.

Katech Performance is located at 24324 Sorrentino Court, Clinton Township, MI, 48035.  Contact the company by phone at 866-KATECH1 or visit online at www.katechengines.com.

Katech Air Attack LS7 SC Fast Facts:

Application: Hot rods, off-road vehicles, show cars
Displacement: 427ci, 7.0L
Bore: 4.125
Stroke: 4.000
Compression ratio: 9.0-10.0:1
Fuel: 93 octane
Boost: 7-10psi
Horsepower: 700-750
Torque: 675-700
Block: LS7 with stud girdle and ARP studs
Heads: LS7 with ARP studs
Crank: Callies forged steel
Connecting rods: Callies H-Beam forged steel
Pistons: Katech forged aluminum with DLC coated pins
Camshaft: Katech Air Attack LS7 SC
Oiling system: LS7 dry sump
Supercharger: Magnuson M122 twin-screw high-helix, intercooled
Throttle body: 105mm cable
Optional Katech valve covers shown