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Instruction Sheets for Part Number HPE-SP105
ATK High Performance Chevy Gen V LT1 416 Short Blocks SP105
Part Number: HPE-SP105
ATK High Performance Chevy Gen V LT1 416 Short Blocks
Engine Assembly, Short Block, LT1/LT4, 6.8L/416, 4.065 in. Bore, 4.000 in. Stroke, Forged Pistons, Two Valve Relief, 58 Tooth, Chevy, Gen V, LT, Each
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Estimated Ship Date: Feb 2, 2027 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
SP105
Part Type:
Product Line:
Summit Racing Part Number:
HPE-SP105
UPC:
00653517725197
Crate Engine Family:
Chevy LT Gen V
Actual Engine Displacement:
6.8L/416
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:
Aluminum
Main Bolt Style:
6-bolt
Main Journal Type:
Chevy Gen V LT
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:
No
Quantity:
Sold individually.
Notes:
GM LT1/LT4 block with 4.065 in. bore and 4.000 in. stroke. Forged 4340 crankshaft with dished +20cc, two valve relief pistons and 58 tooth reluctor wheel.
ATK High Performance Chevy Gen V LT1 416 Short Blocks
ATK High Performance Chevy Gen V LT1 416 short blocks are built for naturally aspirated engines, boost or nitrous. ATK starts with a new GM LT block and outfits it with a Manley 4340 forged crankshaft, H-beam rods with ARP2000 bolts, Manley 2618 forged pistons, and Total Seal CS AP ring package with steel top rings. These short blocks will have the factory piston squirters plugged.
Engine Specifications:
* Block: New GM LT1/LT4
* Bore/Stroke: 4.065 in. x 4.000 in.
* Displacement (cu.in): 416 c.i.d.
* Crankshaft: Manley 4340 forged 58-tooth reluctor wheel
* Rods: Manley 4340 forged H-beam 6.125 in. ARP 2000 bolts
* Pistons: Choice of 2618 forged +10cc or +20cc dished
* Rings: Total Seal CS AP steel top ring with Napier 2nd ring set
* Camshaft bearings: Installed and clocked to OEM position
* Freeze plugs: Installed and sealed
* Oil galley plugs: Installed and sealed
Recommended components:
* Balancer -- Internal balance
* Flex plate / Flywheel -- Internal balance
* Head gasket: .051 in. or per application
* Oil pump: Factory
Engine Info:
* Oil: 5W30 non-synthetic for first 3,000 miles
* Oil filter: Wix or K&N, per application
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