K48 Engine

Specifications

The K48 Engine is a one-of-a-kind, custom-engineered flat-plane V8 developed by Neutron Engines for enthusiasts seeking race-level power, high-revving performance, and lightweight construction. Built around a custom billet 6061 aluminum block, the engine combines two Honda K-series four-cylinder heads—one inverted—to create a compact 4.8L–5.0L V8 capable of delivering exceptional power and responsiveness. In naturally aspirated form, the K48 produces an impressive 750–800 horsepower, while twin-turbocharged configurations can generate between 800 and 1,200 horsepower.

Featuring Darton ductile iron sleeves, a forged 722M24 steel crankshaft, titanium valvetrain components, and a screaming 9,500–10,000 RPM redline, the K48 Hydra is engineered for maximum durability and track-ready performance. Weighing approximately 315 lbs, it offers an outstanding power-to-weight ratio, making it a popular choice for professional motorsports, custom race cars, and extreme performance projects.

Models Compatible

K48 Hydra Naturally Aspirated (9,500 RPM)

The K48 Hydra Naturally Aspirated variant is designed for high-revving track performance, featuring a 9,500 RPM redline and bore sizes ranging from 87mm to 89mm. Built for all-motor applications, it delivers exceptional throttle response, linear power, and race-ready reliability without the need for forced induction.

K48 Hydra All-Motor (10,000 RPM)

The K48 Hydra All-Motor is a maximum-performance naturally aspirated V8 capable of producing over 700 horsepower while revving to an incredible 10,000 RPM. Using an 89mm or 90mm bore, it is compatible with Porsche G50, BMW DCT, and Honda K-series transmissions, making it a versatile choice for custom race and high-performance builds.

K48 Hydra Twin Turbo (800–1,200 HP)

The K48 Hydra Twin Turbo is engineered for extreme power, producing between 800 and 1,200 horsepower depending on the turbo setup and tuning. Built with strengthened internal components to withstand high boost pressures, this variant is ideal for drag racing, time attack, and other motorsport applications where maximum horsepower is the priority.

Frequently Asked Questions