Description
Overview
Brand: ATK High Performance Engines
Manufacturer’s Part Number: SP37-B
Part Type: Short Block Engines
Product Line: ATK High Performance Chevy LS 408 Short Blocks
Summit Racing Part Number: HPE-SP37-B
UPC: 653517340468
Crate Engine Family: Chevy LS
Actual Engine Displacement: 6.7L/408
Rear Main Seal Style: 1-piece
Crankshaft Material: Forged 4340 steel
Piston Material: Forged aluminum
Short Block Piston Style: Dish
Connecting Rod Material: Forged 4340 steel
Connecting Rod Beam Style: H-beam
Engine Block Material: Cast iron
Main Bolt Style: 6-bolt
Main Journal Type: Chevy LS
Deck Height (in.): 9.240 in.
Engine Balance: Internal
Oil Pan Included: No
Timing Cover Included: No
Harmonic Balancer Included: No
Flexplate Included: No
Flywheel Included: No
Assembled: Yes
Remanufactured: Yes
Quantity: Sold individually.
Notes: GM LQ4 block with 4.030 in. bore and 4.000 in. stroke, -10cc dished pistons and 24 tooth reluctor. Boost/nitrous ready with Manley forged 6.125 in. connecting rods, upgraded ARP main studs, ARP 2000 rod bolts and Total Seal CS AP ring package with steel rings gapped for engines with 10+ psi boost.
ATK High Performance Chevy LS 408 Short Blocks
These ATK High Performance Chevy LS 408 short blocks are made to handle some serious power. The foundation of any high performance engine is a rock-solid short block, so ATK designed and developed these to be just that. They feature a fully forged, balanced, and blueprinted rotating assembly that is available in a variety of configurations to fit naturally aspirated, nitrous, and forced induction builds, as well as those with 24 and 58-tooth cranks.
These ATK High Performance Chevy LS 408 short blocks include the following:
* GM LS Iron blocks
* Aligned and hone main bores
* Manley 4340 forged crankshaft
* 4.00 in. stroke
* Manley 4340 H-beam connecting rods
* Manley forged pistons
Fitment and ordering notes
- Confirm the exact model, part number, configuration, dimensions, and application against the information shown in this listing.
- Review the product images and listed attributes before ordering; fitment can vary by vehicle, equipment, year, and installation setup.
- Contact X Factor Motorsport for availability, fitment, product questions, or freight guidance before purchase.
