TSP 427 C.I.D. LSX 1200HP Short Block

Texas Speed & Performance 427 CID LSX 1200HP Short Block

The TSP 427 CID LSX Short Block is built for customers demanding maximum strength and reliability in high horsepower applications. Rated for up to 1200 horsepower, this short block combines premium components and the proven GM LSX block foundation to deliver unmatched durability for extreme street or race builds.

Key Features

• GM LSX Block: Factory-strength foundation engineered to withstand extreme boost and horsepower levels.
• TSP 4.00" Forged Crankshaft: 
• TSP 6.125" Forged I-Beam Rods: 
• Wiseco Forged Pistons: Available in -4cc or -13cc dish options to suit your compression needs, paired with upgraded Wiseco wrist pins for added strength.
• ARP Main Studs: Provides maximum bottom-end clamping force and reliability under boost.
• 58x Reluctor Wheel: Ensures compatibility with Gen IV LS electronics.

Performance Rating

This short block is rated for 1200 HP and is ideal for customers planning large turbocharged, supercharged, or nitrous-assisted combinations. Designed, machined, and assembled in-house by Texas Speed & Performance for precision and quality.

Notes

• Custom piston options (-4cc or -13cc) allow flexibility for different compression setups.
• Final horsepower capability depends on supporting components, fuel system, and tuning.