The Texas Speed 427ci 4.000" Stroke Sleeved Gen V LT2 Stroker Short Block is a custom-built foundation for high-output builds on the Gen V LT2 engine used in the 2020 to 2024 Corvette C8. Texas Speed fully sleeves the LT2 block to a 4.125" bore and fits a 4.000" stroke rotating assembly, raising displacement to 427 cubic inches for more torque and the strength to support high-compression or boosted combinations.
Each short block is machined, balanced, blueprinted and assembled in house, with the connecting rods and pistons chosen at ordering. Rod choices range from Texas Speed H-beam and I-beam rods to Callies Compstar, Ultra H-beam and Ultra Enforcer rods and Wiseco Boostline rods, and pistons include Wiseco, CP, Mahle and Diamond 4.125" forgings from -6.1cc flat top to -23cc dish, including the Diamond LT2K 2000 HP piston set. Oil pan modification or an aftermarket oil pan is required for the stroker crank, and Texas Speed offers a stroker oil pan as an add-on. Break-in oil and the shipping cradle and crate are included.
Specifications
- Engine platform: GM Gen V LT2
- Displacement: 427 cubic inches
- Block: Fully sleeved LT2 block
- Bore: 4.125"
- Stroke: 4.000"
- Connecting rods: 6.125", selected at ordering (TSP H-beam, Super I-beam or billet I-beam with ARP L19 bolts; Callies Compstar, Compstar Extreme or Ultra H-beam with ARP 2000 bolts; Callies Ultra Enforcer I-beam; Wiseco Boostline 3-pocket)
- Pistons: 4.125" bore, selected at ordering (Wiseco -6.9cc flat top, -10cc, -15cc or -20cc dish; CP -12cc or -23cc; Mahle -6.1cc flat top; Diamond Racing LT2K 2000 HP -12cc 1.115" CH)
- Assembly: Precision machined, balanced, blueprinted and assembled by Texas Speed
- Oil pan: Modification or aftermarket stroker oil pan required; Texas Speed stroker oil pan optional
- Applications per Texas Speed: Naturally aspirated, high-compression and forced-induction builds
- Compression ratio: Varies with piston selection, chamber size, head gasket thickness and deck height
- Also included: Break-in oil, engine shipping cradle and crate
Kit Includes
- Gen V LT2 engine block, fully sleeved to 4.125" bore
- 4.000" stroke rotating assembly, balanced and blueprinted
- Connecting rods, 6.125", set of 8 (selected at ordering)
- Forged piston set, 4.125" bore (selected at ordering)
- Royal Purple break-in oil, 16 quarts (RYP-11487)
- Engine shipping cradle (TSP-CradleLT1) and crate (TSP-SDCrateSB)
- Stroker oil pan (optional at ordering)
Ordering Options
Three selections are required when ordering: connecting rods, piston set and whether to include the Texas Speed stroker oil pan (yes or no). An aftermarket or modified oil pan is required for the 4.000" stroke, so choose the oil pan or plan to modify the factory pan.
Note: Oil pan modification or an aftermarket oil pan is required.
Note: All short blocks are custom built to order. Final compression ratio and engine configuration vary with the components selected. Proper tuning and supporting fuel, cooling and engine management systems are required for high-performance applications, and additional vehicle-specific components may be required.
Vehicle Applications
Chevrolet Corvette
- 2020 Chevrolet Corvette — 6.2L LT2
- 2021 Chevrolet Corvette — 6.2L LT2
- 2022 Chevrolet Corvette — 6.2L LT2
- 2023 Chevrolet Corvette — 6.2L LT2
- 2024 Chevrolet Corvette — 6.2L LT2
Vehicle applications reflect the fitment published by Texas Speed & Performance for this part number. Confirm your engine and cylinder head configuration before ordering.
FAQ
What vehicles does the Texas Speed 427 LT2 stroker short block fit?
It is built on the Gen V LT2 block from the 2020 to 2024 Chevrolet Corvette C8, so it is intended for C8 Corvette engine builds and LT2-based swaps.
How does Texas Speed get 427 cubic inches from an LT2?
The LT2 block is fully sleeved to a 4.125" bore and fitted with a 4.000" stroke crankshaft and 6.125" connecting rods, which increases displacement from the factory 6.2L to 427 cubic inches.
Do I need a different oil pan with this short block?
Yes. Texas Speed states that oil pan modification or an aftermarket oil pan is required for the 4.000" stroke, and offers its stroker oil pan as an add-on when ordering.
Is the LT2 short block suitable for boost?
Yes. Texas Speed lists naturally aspirated, high-compression and forced-induction applications. Dish pistons such as the Wiseco -20cc, CP -23cc and the Diamond LT2K 2000 HP set are offered for boosted combinations.
Is the short block balanced and assembled?
Yes. Each 427 LT2 short block is precision machined, balanced, blueprinted and assembled in house by Texas Speed and custom built to order with the rods and pistons selected.
What is not included with the LT2 short block?
Cylinder heads, camshaft, timing components, oil pump, covers and the oil pan (unless the stroker pan is added) are not included. Tuning and supporting fuel, cooling and engine management are also required.
