NRE Twin-Turbo LS 427 | Pro-Touring Series | 1600 HP

The NRE Twin-Turbo LS 427 from the Pro-Touring Series is a turnkey high-performance LS engine designed for ultimate street and track use. Producing 1600 horsepower on race fuel and 1225 HP on pump gas, this engine combines extreme power with street-friendly drivability. Engineered for long-distance cruising at freeway speeds and daily driving, it delivers the classic hot rod sound and feel while remaining fully reliable and maintenance-free.

Performance & Driving Experience

This Twin-Turbo LS 427 is engineered to perform without compromise. Capable of cruising at 2000 RPM on the freeway and driving 400 miles a day, it’s built for enthusiasts who demand both power and refinement. With a self-contained, fully dressed turnkey package, it provides effortless throttle response, smooth power delivery, and a high-performance hot rod exhaust note.

Engine Block & Rotating Assembly

Block

• Dart LS Next, 4.125″ bore, 9.240″ deck, steel splayed caps, six head bolts per cylinder

Rotating Assembly

• Dart billet 4.0″ stroke crankshaft

• Boostline 4340 forged I-beam connecting rods, 6.125″

• Custom JE 2618 forged pistons, 9:1 compression

The forged internals and steel splayed cap block provide exceptional strength for high boost applications, making this engine capable of 1600 HP on race fuel while maintaining long-term reliability.

Cylinder Heads & Valvetrain

• NRE AFR 260CC six-bolt fully CNC ported LS3 heads

• Custom hydraulic roller camshaft

• GM lifters, Comp Cams shaft rocker system

• Manton Series 5 pushrods

• Cloyes timing chain

This valvetrain combination ensures smooth power delivery, high-RPM reliability, and broad torque, optimized for turbocharged performance.

Induction & Fuel System

• Shauns full billet intake manifold with 90 mm drive-by-wire throttle body

• Custom flow-matched 1200 cc injectors

• NRE billet CNC-machined valve covers

The high-flow intake and injectors allow precise fueling under boost, enabling the engine to produce over 1200 HP on pump gas reliably.

Supporting Systems & Accessories

• Holley Terminator fuel management with full harness and sensors

• 60-2 tooth crank trigger ignition

• NRE 304 stainless turbo manifolds with waste-gate attachments

• NRE 72mm Mirror Image Gen 2 billet turbochargers

• Precision 46mm V-band wastegates

• Hi-volume oil pump, Moroso 7-quart road-race oil pan with trap doors

The engine comes fully assembled, wired, and ready to run, making it a true drop-in solution for Pro-Touring builds and high-performance LS swaps.

Specifications

• Engine Type: Twin-Turbo LS 427 Pro-Touring

• Horsepower: 1600 HP on race fuel / 1225 HP on pump gas

• Compression Ratio: 9:1

• Block: Dart LS Next, 4.125″ bore, 9.240″ deck

• Crankshaft: Dart billet 4.0″ stroke

• Connecting Rods: Boostline 4340 forged I-beams, 6.125″

• Pistons: Custom JE 2618 forged

• Cylinder Heads: NRE AFR 260CC six-bolt LS3

• Camshaft: Custom hydraulic roller

• Valvetrain: GM lifters, Comp Cams shaft rockers, Manton pushrods

• Intake Manifold: Shauns billet with 90 mm drive-by-wire TB

• Injectors: 1200 cc flow-matched

• Fuel Management: Holley Terminator with full harness and sensors

• Ignition: 60-2 tooth crank trigger

• Turbochargers: NRE 72mm Mirror Image Gen 2 billet

• Wastegates: Precision 46mm V-band

• Exhaust: NRE 304 stainless turbo manifolds

• Oil System: Hi-volume pump, Moroso 7-quart pan with trap doors

• Valve Covers: NRE billet fully CNC machined