TSP 387 C.I.D. LSx Short-Block

TSP 387 C.I.D. LSx Short-Block

ADD 6–8 WEEK LEAD TIME TO ALL LSX/DART BASED BUILDS DUE TO BLOCK AVAILABILITY!!!

The Texas Speed & Performance 387 C.I.D. LSx Short-Block is built using a brand-new GMPP LSx cast iron block and comes fully assembled with a factory 3.622″ stroke crankshaft and your choice of 24X or 58X reluctor. This is a strong, reliable foundation for street, strip, and boosted combinations.

Key Features:

• New GMPP LSx cast iron block
• Factory GM 3.622″ stroke crankshaft with 24X or 58X reluctor
• Uses a 4.125″ bore piston set for 387 CID (4.130″ bore for 388 CID options)
• Choice of Wiseco or Diamond Racing pistons
• Oil and coolant plugs pre-installed

Options & Notes:

• Optional LS1 conversion package (LS2 timing cover/valley cover/lifter trays, LS2 1X timing set, and harness extensions)
• Upgrade to 1/2″ ARP head studs (includes machining) — requires PRC aftermarket cylinder heads
• Multiple connecting rod and crankshaft brand options available (custom builds)

All TSP engines include 12 quarts of break-in oil at no additional cost to ensure proper startup protection and ring seal.

Note: Piston compatibility varies by head choice (Wiseco supports LS1/LS2/LS6/L92/LS3 and most aftermarket heads; Diamond supports LS1/LS2/LS6). Contact Texas Speed for an itemized quote and build options.