406 Dominator Forged Short Block
406 DOMINATOR | SERIOUS DISPLACEMENT. FORGED PERFORMANCE.
Build your next Small Block Chevrolet around a foundation engineered for serious performance. The 406 Dominator Short Block combines 406 cubic inches of displacement, a heavy-duty aftermarket block, and an Eagle Pro Street forged rotating assembly to deliver the strength and versatility expected from our flagship Dominator engine.
At its core is an all-new Dart SHP aftermarket block featuring splayed four-bolt main caps, priority main oiling, and a modern one-piece rear main seal. A 4.155" bore and 3.750" stroke deliver 406 cubic inches, while an Eagle 4340 forged steel crankshaft, 4340 forged steel FSI I-Beam connecting rods with 7/16" ARP 8740 bolts, and forged performance pistons provide a robust rotating assembly designed for demanding applications.
Every short block receives professional machine work, rotating assembly balancing, and precision assembly with critical measurements and clearances verified throughout the process. The result is more than a collection of premium components. It's a carefully prepared performance foundation built with the same attention to detail found throughout our complete engine packages.
With the bottom end professionally prepared, you have the freedom to select the cylinder heads, camshaft, induction system, and supporting components that best suit your application. Whether you're building a torque-rich street engine, an aggressive naturally aspirated combination, or planning for future performance upgrades, the Dominator provides the displacement and forged internals to support a wide range of goals.
The 406 Dominator Short Block delivers the heart of our flagship crate engine with the flexibility to make the rest of the combination your own.
STARTING AT $6,499
Typical investment varies based on component options, and customer-selected upgrades.Quick Look
Engine Block
Heavy-Duty Aftermarket 4 Bolt 1PC Rear Main Engine Block
4.155" Finished Bore
Priority Main Oiling System
4-Bolt Main Caps with Splayed Outer Bolts
OE Hydraulic Roller Camshaft Compatible
Blind Head Bolt Holes
Cast-In Stroker Clearance
One-Piece Rear Main Seal Design
Rotating Assembly
Eagle Pro Street Fully Forged Rotating Assembly
4340 Forged Steel 3.750" Stroke Crankshaft
5140 Forged Steel FSI I-Beam Connecting Rods
7/16" ARP 8740 Rod Bolts
Forged Performance Pistons
Performance Piston Ring Set
Performance Rod & Main Bearings
4.155" Bore × 3.750" Stroke • 406 Cubic Inches
Compression Ratios Available to Match Your Combination
Precision Assembly
Professionally Machined
Precision Blueprint-Assembled
Rotating Assembly Clearances Verified
Camshaft Degreed for Your Selected Combination
Critical Fasteners Torqued to Specification
Ready for Your Cylinder Head & Induction Combination
Add-ons
Valvetrain & Timing
Your Choice of Hydraulic Roller Camshaft
Stage 1–4 Camshaft Packages or Custom Grind Available
Premium Johnson Hydraulic Roller Lifters
LPC Billet 9-Way Adjustable Double Roller Timing Set w/ Torrington Bearing
ARP Camshaft Hardware
Oiling & Sealing
Complete Melling Performance Oiling System
Hardened Oil Pump Driveshaft
Oil Pickup Depth Properly Set & Verified
Oil Pickup Screen Retainer Installed
Moroso 5-Quart Stroker Oil Pan
Premium One-Piece Oil Pan Gasket
Edelbrock Polished Aluminum Timing Cover
Harmonic Balancer & Adjustable Timing Pointer Included
ARP Timing Cover & Harmonic Balancer Hardware
Why Choose Reid’s speed Shop?
Purchasing a performance engine is a significant investment, and choosing the right builder is just as important as selecting the right components. At Reid's Speed Shop, every engine receives the individual attention, precision, and craftsmanship expected from a dedicated performance engine building shop.
Each combination is carefully planned around its intended application, with components selected for compatibility, performance, and long-term reliability. Throughout assembly, critical measurements and clearances are verified to ensure every engine meets our standards before completion.
One of the greatest advantages of working with Reid's Speed Shop is direct communication with the person building your engine. Customers are kept informed throughout the process, with progress updates and photographs providing an inside look at their engine as it comes together.
Complete hydraulic roller engine combinations also undergo operating verification on our dedicated engine test stand, allowing us to monitor critical operating conditions and inspect for potential issues before delivery. Customers can see and hear their completed engine running through video updates or in person when arrangements allow.
From initial consultation to final verification, our focus is on delivering a professionally built performance engine and a customer experience that inspires confidence in every step of the process.