TSP LT 376 Long Block

Texas Speed LT 376 LB Long Block

Built for high-performance L86-based applications, the Texas Speed LT 376 LB Long Block offers a forged and stroked foundation for serious power builds. Utilizing a genuine GM LT1 aluminum block paired with a 3.622″ stroke crankshaft and 4.070″ bore forged pistons. The TSP H-beam rods and ARP main studs round out a proven setup for builders targeting strength, reliability, and precision.

Core Components

• Engine Block: GM LT1 Aluminum Block (Gen V, 6.2L)
• Crankshaft: GM Wet Sump 3.622″ Stroke Crankshaft
• Connecting Rods: Texas Speed 6.125″ H-Beam Connecting Rod Set
• Pistons: Wiseco 4.070″ -2cc Forged Pistons
• Main Stud Kit: ARP Main Stud Kit (LT1 6.2L)
• Cylinder Heads: PRC Ported GM LT1 Heads
• Camshaft: Texas Speed Gen 5 L86 6.2L Stage 1 Camshaft: 218/230 .610″/.610″ 114 LSA 108 ICL w/ +10% Fuel Pump Lobe

Technical Specifications

• Displacement: 376 CID (Factory LT1 Bore/Stroke)
• Bore Size: 4.070″
• Stroke: 3.622″
• Rod Length: 6.125″
• Compression Ratio: ~11.7:1 with -2cc Pistons (varies with heads/chamber)
• Balancing: Internally Balanced Rotating Assembly

Performance & Compatibility

This long block is ideal for performance builds in Gen V LT platforms and swap applications. The TSP LT376 LB is designed to support high-RPM, high-horsepower demands builds. With premium forged internals and expert assembly, it offers a stout and scalable base for serious street or track machines.