TSP 427 C.I.D. LSx Long-Block

TSP 427 C.I.D. LSx Long-Block

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

The Texas Speed & Performance 427 C.I.D. LSx Long-Block is built around a brand-new GM Performance LSx iron block with a 4.00″ stroke crankshaft and your choice of 24X or 58X reluctor. Designed for serious high-horsepower builds, this package includes forged internals and premium top-end components.

Key Features:

• New GM LSx iron block with 6-bolt head capability
• 4.125″ or 4.127″ bore forged piston set (Wiseco, Diamond, or Mahle 2618)
• Your choice of TSP camshaft
• PRC 247cc 6-bolt cylinder heads
• Johnson hydraulic roller lifters with tie bars
• ARP head stud kit + Cometic MLS 6-bolt head gaskets
• TSP hardened chromemoly pushrods

Includes Complete Hardware Package:

• Timing set (LS2/LS3/LS7-specific)
• Cam retainer plate, seals, gaskets, dowel pins, oil pump O-ring
• Oil pan gasket, water pump gaskets, ARP balancer bolt, and more

Available Options:

• Optional LS1 conversion package for LS1 swaps
• Dry-sump crank option for 2006+ Corvette Z06 / GS / ZR1 installs
• Upgrade to 1/2″ head studs for extreme boost or nitrous applications

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

Note: Intake manifold and rocker arm selection must match cylinder head port style. Custom and turn-key packages are available—contact Texas Speed for an itemized quote.