Although the 427 name recalls classic American big blocks, this engine is based on the modern GM LS platform. Its displacement measures 427.7 cubic inches, or approximately 7.0 liters.

The aluminum engine block uses reinforced iron cylinder sleeves and six bolt cylinder heads for maximum strength under high boost. Forged internal components, including the crankshaft, connecting rods and custom pistons, are designed to handle extreme power levels.

A relatively low 9.0:1 compression ratio allows the engine to safely produce massive power while operating on widely available 91 octane pump fuel. Revised cylinder heads and a custom camshaft further improve airflow and durability.

Power comes from a pair of Nelson Racing Mirror Image Generation 2 turbochargers measuring 72 mm each. The system includes forged compressor wheels, custom exhaust manifolds, upgraded wastegates and precision blow off valves to carefully control boost pressure.

On standard 91 octane gasoline, the engine produces 1,200 hp at 7,200 rpm. Drivers looking for even greater performance can switch to race fuel, allowing output to climb to an astonishing 1,500 hp for dedicated track use.

This flexibility gives builders the option of enjoying extreme performance on the street while unlocking even greater potential during racing events.

The Intercooled Outlaw 427 Twin Turbo starts at 41,999 dollars. Every engine is built to customer specifications and undergoes complete dynamometer testing before delivery to verify performance and reliability.

While the price is comparable to a new midsize sedan, the performance is in an entirely different league. Buyers receive a professionally assembled, dyno tested engine capable of producing four digit horsepower using fuel available at ordinary gas stations.

For enthusiasts building high performance street cars, restomods or custom race projects, the Outlaw 427 offers a rare combination of reliability, everyday usability and extraordinary power that few crate engines can match.