The Texas Speed LT2 388ci Resleeved Short Block 10.6:1 is a forged short block for 2020 and newer C8 Corvette LT2 engine builds. A genuine GM LT2 Gen V aluminum block is reinforced with aftermarket sleeves, which allows the bore to grow to 4.125" while the factory style 3.622" stroke is retained, bringing displacement to 388 cubic inches.
The rotating assembly uses the GM LT2 crankshaft, Texas Speed 6.125" Super I-beam connecting rods and Diamond 4.125" forged pistons with a -12cc dish for a 10.6:1 compression ratio, and it is internally balanced. An ARP main stud kit and a Precision Gen 5 LT billet oil restrictor are included. Texas Speed rates the combination for up to 1,200 horsepower in forced induction, nitrous or high-compression naturally aspirated use, noting that this is a capability rating rather than a guaranteed output and that supporting fuel, cooling, induction, engine management and tuning are required.
Specifications
- Engine platform: Gen V LT2 (C8 Corvette)
- Displacement: 388 cubic inches
- Block: GM LT2 Gen V aluminum block with aftermarket sleeves
- Bore: 4.125"
- Stroke: 3.622"
- Rod length: 6.125"
- Crankshaft: GM LT2
- Connecting rods: Texas Speed 6.125" Super I-beam
- Pistons: Diamond 4.125" bore forged, -12cc dish
- Compression ratio: 10.6:1
- Main fasteners: ARP main stud kit for 2014+ LT1 6.2L
- Oil restrictor: Precision Gen 5 LT billet
- Balancing: Internally balanced rotating assembly
- Power rating: 1,200 horsepower capability per Texas Speed
Kit Includes
- Texas Speed LT2 388 resleeved 10.6:1 short block (TSP-LT2-388SB-10.6-STD)
- GM LT2 Gen V aluminum block with aftermarket sleeves (installed)
- ARP main stud kit for 2014+ LT1 6.2L (installed)
- Precision Gen 5 LT billet oil restrictor
- Royal Purple 10W-30 break-in oil, 16 quarts (RYP-11487)
- Texas Speed LT1 engine stand for shipping (TSP-CradleLT1)
- Shipping crate (TSP-SDCrateSB)
Note: The 1,200 HP figure is Texas Speed's rated capability for the short block combination, not a guaranteed output. Proper tuning and supporting fuel, cooling, induction and engine management systems are required. Verify final engine configuration and vehicle compatibility before installation; 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 is included in the Texas Speed LT2 388 resleeved 10.6:1 short block?
It includes a GM LT2 Gen V aluminum block with aftermarket sleeves, the GM LT2 crankshaft, Texas Speed 6.125" Super I-beam rods, Diamond 4.125" forged -12cc pistons, an ARP main stud kit and a Precision Gen 5 LT billet oil restrictor, internally balanced, plus 16 quarts of break-in oil, an engine stand and a shipping crate.
Which Corvettes does the LT2 388 short block fit?
Texas Speed builds it for 2020 and newer C8 Corvette LT2 applications. Verify the final engine configuration and vehicle compatibility before installation, since additional vehicle-specific components may be required depending on the build.
What is the difference between the 10.6:1 and 11.6:1 LT2 388 short blocks?
Both share the sleeved LT2 block, 4.125" bore, GM LT2 crankshaft and Texas Speed Super I-beam rods and are rated for 1,200 horsepower. This version uses Diamond -12cc dish pistons for 10.6:1 compression, which suits forced induction, while the 11.6:1 version (TSP-LT2-388SB-11.6-STD-Kit) uses Diamond -4cc pistons.
How much power is the LT2 388 short block rated for?
Texas Speed rates the short block combination for 1,200 horsepower. The figure is a capability rating, not a guaranteed output; final horsepower depends on the induction system, power adder, fuel system, tuning and supporting components.
How does the LT2 block reach a 4.125" bore?
Texas Speed installs aftermarket sleeves in the genuine GM LT2 Gen V aluminum block, which reinforces the cylinders and allows the bore to be opened to 4.125" while keeping the 3.622" stroke, for 388 cubic inches.
Is the LT2 388 short block balanced and assembled?
Yes. The rotating assembly is internally balanced and the short block ships assembled with ARP main studs and the billet oil restrictor installed, ready for cylinder heads, camshaft and the remaining top-end components.
