BTR Assembled Dart Based LS Short Block

BTR is proud to announce our latest LSx offering. Starting with a new Dart SHP Pro iron block or Dart Skirted Aluminum block, the blocks are CNC finished machined in our state of the art, In-House machine shop by our talented machinists. All critical engine tolerances are checked and documented before final assembly in one of our dedicated engine clean rooms to our precision specifications. Once this process is finished, these short blocks are assembled utilizing proven, quality rotating assembly components that are balanced before final assembly. If you decide to own one of these, be warned as they are expected to produce high horsepower pass after pass on your way to Victory Lane!
****Please reach out to our experienced Sales team for help with any and all questions or advice on parts to complete your short block. ****
Iron 1500hp 388ci LS
Dart SHP Pro Block
Callies Compstar 3.622” CCW Crankshaft
Oliver 6.125” Speedway Connecting Rods
4.125” Bore -2.7cc Flat Top CP Bullet Pistons
ACL Main and Rod Bearings
Iron 1500hp 427ci LS
Dart SHP Pro Block
Callies Compstar 4.000” CCW Crankshaft
Oliver 6.125” Speedway Connecting Rods
4.125” Bore -4.6cc Flat Top CP Bullet Pistons
ACL Main and Rod Bearings
Iron 1500hp 427ci LS - Dry Sump
Dart Skirted Aluminum Block
Callies Compstar 4.000” CCW Dry Sump Crankshaft
CP Bullet Series Forged 6.125" Connecting Rods
4.125” Bore -4.6cc Flat Top CP Bullet Pistons
ACL Main and Rod Bearings
Aluminum 1500hp 388ci LS
Dart SHP Pro Block
Callies Compstar 3.622” CCW Crankshaft
CP Bullet Series Forged 6.125" Connecting Rods
4.125” Bore -2.7cc Flat Top CP Bullet Pistons
ACL Main and Rod Bearings
Aluminum 1500hp 427ci LS
Dart Skirted Aluminum Block
Callies Compstar 4.000” CCW Crankshaft
CP Bullet Series Forged 6.125" Connecting Rods
4.125” Bore -4.6cc Flat Top CP Bullet Pistons
ACL Main and Rod Bearings