TSP 388 CID Stock Stroke Sleeved Gen 5 LT2 Short-Block

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.