The TSP 427 CID 4.00" Stroke Sleeved Gen 5 LT2 Short-Block is a fully custom-built foundation for serious Gen V LT performance builds. Featuring a sleeved LT2 block with a 4.125" bore and 4.00" stroke, this 427 cubic inch combination delivers increased displacement, improved torque output, and the strength required for high-compression or boosted applications.

Each short-block is precision machined, balanced, blueprinted, and assembled in-house to meet the demands of high-horsepower street, strip, and forced-induction combinations. Multiple connecting rod and piston configurations allow the short-block to be tailored to the intended engine combination.

INCLUDED COMPONENTS

Gen 5 LT2 Engine Block
Fully Sleeved 4.125" Bore Configuration
4.00" Stroke Rotating Assembly
Customer-Selected Connecting Rod Configuration
Customer-Selected 4.125" Bore Piston Configuration
Precision Machining, Balancing, Blueprinting, and Assembly

OPTIONAL COMPONENTS

TSP 6.125" H-Beam Connecting Rods - ARP L19 bolts and .927" pin.
Callies Compstar 6.125" H-Beam Connecting Rods - ARP 2000 bolts and .927" pin.
Callies Compstar Extreme H-Beam Connecting Rods - ARP 2000 bolts.
TSP 6.125" Super I-Beam Connecting Rods - ARP L19 bolts and .927" pin.
Wiseco Boostline 3-Pocket Connecting Rod Set
TSP 6.125" Billet I-Beam Connecting Rods - ARP L19 bolts.
Callies 6.125" Ultra H-Beam Connecting Rods - ARP 2000 bolts and .927" pin.
Callies Ultra Enforcer I-Beam Connecting Rods
Callies Ultra Enforcer I-Beam Connecting Rods - 3.5 Multi-Phase Bolt.

PISTON OPTIONS

Wiseco 4.125" - -6.9cc Flat-Top
Wiseco 4.125" - -10cc Dish
Wiseco 4.125" - -15cc Dish
Wiseco 4.125" - -20cc Dish
CP 4.125" - -12cc
CP 4.125" - -23cc
Mahle 4.125" - -6.1cc Flat-Top
Diamond Racing LT2K 2000HP Piston Set - LT1/LT4 Gen V, 4.125" bore, 4.000" stroke, 6.125" rod, -12cc, 1.115" compression height.

ENGINE SPECIFICATIONS

Engine Platform: Gen 5 LT2
Engine Displacement: 427 CID
Bore: 4.125"
Stroke: 4.00"
Engine Block: Fully Sleeved LT2 Block
Compression Ratio: Varies based on piston selection, cylinder head chamber size, head gasket thickness, deck height, and final engine configuration.
Applications: Naturally Aspirated, High-Compression, and Forced-Induction Builds

INSTALLATION NOTES

Oil pan modification or an aftermarket oil pan is required.
Final compression ratio will vary based on piston selection and cylinder head chamber size.
Select the appropriate connecting rod and piston combination based on intended power level and application.
Proper tuning and supporting fuel, cooling, and engine management systems are required for high-performance applications.
Additional vehicle-specific components may be required for installation.

Note: All short-blocks are custom built to order. Final compression ratio and engine configuration will vary based on selected components. Oil pan modification or an aftermarket oil pan is required.