TSP 5.3L 332ci Iron Short Block “Ruthless Runt”

TSP “Iron Ruthless Runt” 5.3L 332ci Short Block

The TSP Iron Ruthless Runt is a limited-run 5.3L short block engineered for serious horsepower. Whether you’re going naturally aspirated or boosted, this compact brute is built to handle up to 1000 horsepower while maintaining the quality and precision you’d expect from a full custom build — without the wait.

Key Features:

• Displacement: 332ci / 5.3L
• Block: GM Gen III or IV Iron 5.3L Block
• Main Fasteners: ARP Main Stud Kit
• Crankshaft: GM 3.622” Nodular Iron Crankshaft – 24X or 58X Reluctor – 6-Bolt
• Pistons: TSP/Wiseco Forged -4cc Dished 3.820” Pistons – No Valve Reliefs – Boost or N/A
• Connecting Rods: TSP Forged 4340 Steel 6.125” H-Beam Rods
• Horsepower Rating: 1000 HP Capable

Why Choose the Iron Ruthless Runt?

• In-Stock & Ready to Ship: No wait times — these blocks are on the shelf and moving fast
• Compact & Ruthless: A 5.3L that punches way above its weight class
• Built for Boost or NA: Dished pistons handle both setups with ease
• Proven Internals: Forged rotating assembly using name-brand components

Compatibility Note:

The GEN IV engine comes equipped with a 58x reluctor wheel. If you’re installing it into a 24x Gen III-equipped vehicle, be sure to add the Lingenfelter Crank Sensor Conversion Box (Part #L460065397) from Related Products below