Texas Speed 426 CID GEN III HEMI Long Block – 2,000HP Capable

The Texas Speed 426 CID GEN III HEMI Long Block is built for big boost, big power, and bulletproof reliability. Engineered for turbocharged or supercharged builds, this long block starts with a brand-new Dart GEN III HEMI Iron Block and is loaded with premium forged internals, high-flow cylinder heads, and a custom TSP boost camshaft designed for serious performance.

Key Specs:

Horsepower Rating: 2,000HP Capable
Block: Brand New Dart GEN III HEMI Iron Block
Displacement: 426 CID (7.0L)
Compression Ratio: 10.4:1
Crankshaft: Callies Magnum 4340 Forged Steel, 4.050" Stroke
Connecting Rods: TSP Billet 4340 Super I-Beam, 6.125"
Pistons: Mahle 2618 Forged Aluminum, 4.095" Bore, Flat-Top
Wrist Pins: Heavy-Duty Upgraded Pins for Boosted Loads
Camshaft: TSP GEN III HEMI Stroker Boost Cam – 238/259 .622"/.618" 120+5
Cylinder Heads: AFR 224cc GEN III HEMI CNC Heads
Oil Pump: Melling High-Volume Oil Pump
Valvetrain: TSP GEN III HEMI Valvetrain Stabilizer Kit
Reluctor Wheel: 58x – Compatible with 2013+ GEN III HEMI Platforms

Designed for Big Power Applications

Whether you're planning a twin-turbo street car or a high-boost drag build, this 426 CID long block is made to handle the load. The combination of our AFR 224cc cylinder heads, custom boost camshaft, and premium rotating assembly ensures maximum airflow, durability, and power output under pressure.

⚠ Fitment & ECU Notice

This engine is compatible with 2009–2024 GEN III HEMI platforms but is not intended as a drop-in for factory ECU applications. An aftermarket standalone engine management system is highly recommended for optimal tuning and performance.

If you're serious about horsepower and need a HEMI long block that’s ready for serious boost, the Texas Speed 426 CID GEN III HEMI is the perfect foundation to build your next monster.