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

The TSP 388 CID Stock Stroke Sleeved Gen 5 LT2 Short-Block is a fully custom-built foundation for serious naturally aspirated or boosted Gen V LT builds. Featuring a sleeved LT2 block with a 4.125” bore and stock 3.622” stroke, this 388 cubic inch combination delivers increased displacement while maintaining factory stroke geometry.

Each short-block is precision machined, balanced, blueprinted, and assembled in-house to meet the demands of high horsepower street and race applications.

Crankshaft Options:

GM LT2 Crankshaft
Callies Compstar Gen V LT2, 3.625 Stroke, Wet Sump Crank

Connecting Rod Options:

TSP 6.125" H-Beam w/ ARP L19 Bolts, .927" Pin
Callies Compstar 6.125" H-Beam w/ ARP 2000 Bolts, .927" Pin
Callies Compstar Extreme H-Beam w/ ARP 2000 Bolts
TSP 6.125" Super I-Beam w/ ARP L19 Bolts, .927" Pin
Wiseco Boostline 3-Pocket Connecting Rod Set
TSP 6.125" Billet I-Beam w/ ARP L19 Bolts
Callies 6.125" Ultra H-Beam w/ ARP 2000 Bolts, .927" Pin
Callies Ultra Enforcer I-Beam Connecting Rod
Callies Ultra Enforcer I-Beam Connecting Rod 3.5 Multi-Phase Bolt

Piston Options:

Diamond Piston LT1/LT4 Gen V 4.125 Bore x 3.622 Stroke 1.304 CH – Std Kit, 12cc Dish
Diamond Piston LT1/LT4 Gen V 4.125 Bore x 3.622 Stroke 1.304 CH – Std Kit, 4cc Dish

Key Specifications:

Engine Platform: Gen 5 LT2
Displacement: 388 CID
Bore: 4.125"
Stroke: 3.622" (Stock Stroke)
Fully Sleeved Block

This custom 388 CID LT2 short-block is ideal for builders looking to maximize displacement and durability while retaining stock stroke geometry. Whether your combination is high-compression naturally aspirated or boost-focused, this short-block provides a strong, reliable foundation for your Gen V LT build.

Note: All short-blocks are custom built to order. Compression ratio will vary depending on piston selection and cylinder head chamber size.