TSP 408ci Gen 3 Short Block -11cc

TSP “Sledgehammer” 408ci / 6.6L Gen III LQ9 Short Block

This Gen III LQ9-based monster is engineered to take punishment and deliver reliable, big-power performance. Perfect for both naturally aspirated and boosted setups, the Sledgehammer is ready to strike hard—whether you’re on the street or at the strip.

Overview:

The Texas Speed & Performance “Sledgehammer” 408ci / 6.6L Short Block is based on the durable GM Gen III 6.0L LQ9 iron block and combines brute strength with precision craftsmanship to handle up to 1,000 horsepower. Each short block is balanced, blueprinted, and assembled in-house by our expert engine builders—giving you the same precision and quality found in our custom builds, without the wait.

Sledgehammer Build Specifications:

• Displacement: 408 cid / 6.6 L Gen III
• Block: Brand-new GM LQ9 6.0 L iron block
• Fasteners: ARP Main Stud Kit
• Crankshaft: TSP 4.000″ Forged Steel Crank – 24x Reluctor – 6-Bolt Main
• Pistons: TSP / Wiseco Forged 4.030″ – Available in -11 cc Flat Top Configuration
• Connecting Rods: TSP Technologies 4340 Forged 6.125″ H-Beam
• Power Capability: 1,000 HP Capable

Why Choose the “Sledgehammer”?

• In-stock and ready to ship within days
• Fully balanced and blueprinted assembly
• Same machining precision as our full custom engine program
• Perfect for boosted, nitrous, or naturally aspirated builds
• Proven durability backed by Texas Speed & Performance quality