The Texas Speed 376ci Sleeved Gen V LT1/LT4 Short Block starts with a new Gen V aluminum block fitted with dry sleeves that are thicker and stronger than the factory sleeves, machined and assembled at the Texas Speed engine facility. It keeps the stock 3.622" stroke and is intended as a foundation for high-performance and boosted LT1 and LT4 builds where the factory block's cylinder walls are the limit.
The buyer configures the short block at ordering: Darton or Power Bore sleeves, a GM wet sump, GM dry sump, TSP forged dry sump or Callies Magnum crankshaft, Wiseco or Mahle Motorsports 2618 forged pistons at a 4.070" or 4.075" bore with lowered ring lands for nitrous or boost, and a 6.125" rod set from Texas Speed, Callies or BoostLine. The block can be supplied by the customer or a new GM Gen V block can be added. Oil and coolant plugs are pre-installed, and Texas Speed includes break-in oil with every engine. Texas Speed recommends not exceeding a 4.125" bore with a power adder.
Specifications
- Displacement: 376 cubic inches (nominal, stock stroke)
- Block: New Gen V aluminum block (GM Gen V block selected at ordering, or customer supplied)
- Sleeves: Darton dry sleeves or Power Bore sleeves, selected at ordering
- Stroke: 3.622"
- Bore: 4.070" or 4.075" depending on piston set selected
- Crankshaft: GM wet sump standard snout, GM dry sump long snout LT1/LT4, Texas Speed forged 8-bolt long snout dry sump, or Callies Magnum 3.625" wet sump 8-counterweight, selected at ordering
- Pistons: Wiseco Armor Coat forged 4.070" -2cc or -12cc, Wiseco 4.075" -12cc dish, or Mahle Motorsports 2618 forged 4.070" -4cc or -16cc, selected at ordering
- Piston features: 2618 forgings with lowered ring lands for nitrous or boost; Wiseco sets include wrist pins and rings
- Connecting rods: 6.125" H-beam or I-beam sets from Texas Speed, Callies or BoostLine, selected at ordering
- Oil and coolant plugs: Pre-installed
- Assembly: Machined and assembled in-house by Texas Speed
- Break-in oil: Included
- Power adder bore limit per Texas Speed: 4.125"
Kit Includes
- New Gen V aluminum block, sleeved and machined (GM Gen V block selected at ordering, or customer supplied)
- Darton or Power Bore dry sleeves (selected at ordering)
- Crankshaft (selected at ordering)
- Forged piston set, Wiseco or Mahle Motorsports (selected at ordering)
- Connecting rod set, 6.125" (selected at ordering)
- Oil and coolant plugs, installed
- Royal Purple break-in oil (RYP-11487), 16 quarts per TSP component list
- Engine cradle required for shipping (TSP-CradleLT1)
- Shipping crate required for shipping (TSP-SDCrateSB)
Ordering Options
Five selections are required when ordering: Cylinder Sleeves (Darton or Power Bore), Crankshaft (Callies Magnum 3.625" wet sump 8-counterweight, Texas Speed forged 3.622" 8-bolt long snout dry sump, GM wet sump 3.622" standard snout, or GM dry sump long snout LT1/LT4), Pistons (Mahle Motorsports 4.070" -4cc or -16cc, Wiseco Armor Coat 4.070" -2cc or -12cc, or Wiseco 4.075" -12cc dish), Rods (Texas Speed Super H-beam, Super I-beam or billet Super I-beam, Callies Compstar, Compstar Xtreme, Ultra H-beam or Ultra Enforcer I-beam, or BoostLine 3-pocket) and Engine Block (new GM Gen V block or customer supplied). Custom piston volumes and bore sizes are available from Texas Speed with additional lead time.
Note: Texas Speed does not recommend exceeding a 4.125" bore on power-adder applications.
Note: Custom configurations, piston volumes and bore sizes are available; contact Texas Speed for an itemized quote, piston options and current build time. Additional lead time may apply.
Note: Engines ship by truck freight on a cradle in a crate. Final freight cost is confirmed by Texas Speed after the order is placed.
Vehicle Applications
Engine families covered per Texas Speed: GM Gen V 6.2L LT1 and LT4, plus L86 and L87 6.2L truck applications. Confirm wet sump or dry sump crankshaft for the target vehicle.
Chevrolet Camaro
- 2016 Chevrolet Camaro
- 2017 Chevrolet Camaro
- 2018 Chevrolet Camaro
- 2019 Chevrolet Camaro
- 2020 Chevrolet Camaro
- 2021 Chevrolet Camaro
Chevrolet Camaro ZL1
- 2017 Chevrolet Camaro ZL1
- 2018 Chevrolet Camaro ZL1
- 2019 Chevrolet Camaro ZL1
- 2020 Chevrolet Camaro ZL1
- 2021 Chevrolet Camaro ZL1
- 2022 Chevrolet Camaro ZL1
- 2023 Chevrolet Camaro ZL1
- 2024 Chevrolet Camaro ZL1
Chevrolet Corvette
- 2014 Chevrolet Corvette
- 2015 Chevrolet Corvette
- 2016 Chevrolet Corvette
- 2017 Chevrolet Corvette
- 2018 Chevrolet Corvette
- 2019 Chevrolet Corvette
Cadillac CT5-V Blackwing
- 2022 Cadillac CT5-V Blackwing
- 2023 Cadillac CT5-V Blackwing
Cadillac CTS-V
- 2016 Cadillac CTS-V
- 2017 Cadillac CTS-V
- 2018 Cadillac CTS-V
- 2019 Cadillac CTS-V
Cadillac Escalade
- 2015 Cadillac Escalade
- 2016 Cadillac Escalade
- 2017 Cadillac Escalade
- 2018 Cadillac Escalade
- 2019 Cadillac Escalade
GMC Sierra 1500
- 2014 GMC Sierra 1500
- 2015 GMC Sierra 1500
- 2016 GMC Sierra 1500
- 2017 GMC Sierra 1500
- 2018 GMC Sierra 1500
- 2019 GMC Sierra 1500
- 2020 GMC Sierra 1500
- 2021 GMC Sierra 1500
- 2022 GMC Sierra 1500
Chevrolet Silverado 1500
- 2014 Chevrolet Silverado 1500
- 2015 Chevrolet Silverado 1500
- 2016 Chevrolet Silverado 1500
- 2017 Chevrolet Silverado 1500
- 2018 Chevrolet Silverado 1500
- 2019 Chevrolet Silverado 1500
- 2020 Chevrolet Silverado 1500
- 2021 Chevrolet Silverado 1500
- 2022 Chevrolet Silverado 1500
Chevrolet Suburban
- 2015 Chevrolet Suburban
- 2016 Chevrolet Suburban
- 2017 Chevrolet Suburban
- 2018 Chevrolet Suburban
- 2019 Chevrolet Suburban
- 2020 Chevrolet Suburban
- 2021 Chevrolet Suburban
- 2022 Chevrolet Suburban
Chevrolet Tahoe
- 2015 Chevrolet Tahoe
- 2016 Chevrolet Tahoe
- 2017 Chevrolet Tahoe
- 2018 Chevrolet Tahoe
- 2019 Chevrolet Tahoe
- 2020 Chevrolet Tahoe
- 2021 Chevrolet Tahoe
- 2022 Chevrolet Tahoe
GMC Yukon
- 2015 GMC Yukon
- 2016 GMC Yukon
- 2017 GMC Yukon
- 2018 GMC Yukon
- 2019 GMC Yukon
- 2020 GMC Yukon
- 2021 GMC Yukon
- 2022 GMC Yukon
Chevrolet Zo6 Corvette
- 2015 Chevrolet Zo6 Corvette
- 2016 Chevrolet Zo6 Corvette
- 2017 Chevrolet Zo6 Corvette
- 2018 Chevrolet Zo6 Corvette
- 2019 Chevrolet Zo6 Corvette
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 376ci Sleeved Gen V LT1/LT4 Short Block?
It includes a new Gen V aluminum block with Darton or Power Bore dry sleeves, the crankshaft, forged piston set and 6.125" rod set selected at ordering, pre-installed oil and coolant plugs, break-in oil, and a shipping cradle and crate. The block is machined and assembled by Texas Speed.
What engines and vehicles is this sleeved short block for?
Texas Speed builds it for Gen V 6.2L LT1 and LT4 stock-stroke combinations, which covers the 2014 to 2019 Corvette, 2016 and newer Camaro SS and ZL1, 2016 to 2019 CTS-V and 6.2L Gen V trucks and SUVs. Choose a wet sump or dry sump crankshaft to match the vehicle.
Why use a sleeved block instead of a factory LT1 block?
Texas Speed states the Darton or Power Bore dry sleeves are thicker and stronger than the factory sleeves, which makes the block a better foundation for high-horsepower and boosted LT builds than the stock casting.
Which piston should I choose for this LT short block?
Texas Speed offers Wiseco and Mahle Motorsports 2618 forged pistons with lowered ring lands in volumes from -2cc to -16cc. Smaller dishes raise compression for naturally aspirated use and deeper dishes lower it for boost or nitrous. Final compression depends on the heads and gasket used.
Can I supply my own Gen V block?
Yes. The Engine Block menu offers a customer-supplied block or a new GM Gen V block from Texas Speed. Either way the block is sleeved, machined and assembled at the Texas Speed facility.
Is break-in oil included with the short block?
Yes. Texas Speed includes break-in oil with every engine at no additional cost to protect the engine at startup and help the rings seal during break-in.
