TSP "Iron Ruthless Runt" 5.3L 332ci Short Block – Gen IV LS
The TSP Iron Ruthless Runt is a limited-run Gen IV 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:
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Displacement: 332ci / 5.3L
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Block: GM Gen IV Iron 5.3L Block
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Main Fasteners: ARP Main Stud Kit
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Crankshaft: GM 3.622” Nodular Iron Crankshaft – 58X Reluctor – 6-Bolt
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Pistons: TSP/Wiseco Forged -4cc Dished 3.820” Pistons – No Valve Reliefs – Boost or N/A
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Connecting Rods: TSP Forged 4340 Steel 6.125” H-Beam Rods
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Horsepower Rating: 1000 HP Capable
Why Choose the Iron Ruthless Runt?
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In-Stock & Ready to Ship: No wait times — these blocks are on the shelf and moving fast
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Compact & Ruthless: A 5.3L that punches way above its weight class
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Built for Boost or NA: Dished pistons handle both setups with ease
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Proven Internals: Forged rotating assembly using name-brand components
Compatibility Note:
This 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 the dropdown menu above.
Quantities are limited. When they’re gone, they’re gone.
