
BLUEPRINT ENGINESPART NUMBER: 138-BLS4278K4L7
BLS4278K4L7 Standard Edition GM LS Compatible Builder Series, EFI, Natural Pulley Kit
$26,29900
Truck Freight
427 c.i. GM LS Compatible Builder SeriesStandard Edition Fuel Injected 4L65/70E Automatic Transmission Natural Pulley Kit Includes 30-Month / 50,000 Mile Warranty & Dyno Tested
BluePrint Engines BLS4278K4L7
- Air Cleaner Included: No
- Block Description: BluePrint Engines High Strength Cast Iron (LSX Style) Block - 6 Bolt Main - 4.0665" Bore
- Cam: Hydraulic Roller - .624 Intake / .624 Exhaust Lift - 239 Intake / 255 Exhaust Duration [email protected] LSA
- Carb/Fuel Injection Included: Yes
- Compression Ratio: 11.0:1
- Crankshaft Vendor: BluePrint Engines
- Cylinder Head Vendor: BluePrint Engines
- Cylinder Heads: LS3 Aluminum Cylinder Heads
- Cylinder Heads Included: Yes
- Distributor Included: Coil Packs
- Distributor Vendor: BluePrint Engines
- Engine Balance: Internally Balanced
- Firing Order: 1,8,7,2,6,5,4,3
- flexplate/flywheel included: Yes
- Fuel Delivery Type: Fuel Injected
- Fuel Delivery Vendor: Holley Terminator EFI
- Fuel Pump Included: No
- Harmonic Balancer Included: Yes
- Horsepower: 625
- Intake Manifold Included: Yes
- Intake Manifold Type: BluePrint Engines Cast Aluminum Intake
- Intake Manifold Vendor: BluePrint Engines
- Oil Pan Included: Yes-Rear Sump
- Pistons: Forged
- Quantity: EA
- Rear Main Seal Style: 1 Piece
- Recommended Flexplate/Flywheel: Non Weighted BPP12654640 - BPPLS1611
- Recommended Harmonic Balancer: Non-Weighted
- Recommended Octane Fuel: 91+ Octane
- Recommended Spark Plug: CCH9405
- Recommended Spark Plug Gap: .045 in.
- Recommended Stall Converter: 2200+ RPM
- Rotating Assembly: Forged Crank - 4.125 in. Stroke and Forged 6.125 in. Rods
- Spark Plug Wires Included: Coil Packs
- Spark Plugs Included: Yes
- Timing Cover Included: Yes
- Timing Requirements: ECM Supplied with Calibration
- Torque: 565
- Transmission Model: 4L65/70E
- Transmission Type: Automatic
- Water Pump Included: Yes
Part TypeEngine
BrandBLUEPRINT ENGINES
Package Height30.0
Package Width30.0
Package Length60.0
Weight750.0 PG
Part CategoryPerformance Parts
Spark Plug Wires IncludedCoil Packs
Fuel Pump IncludedNo
Air Cleaner IncludedNo
Cylinder Heads IncludedYes
Water Pump IncludedYes
Harmonic Balancer IncludedYes
QuantityEA
Intake Manifold IncludedYes
Transmission TypeAutomatic
Engine BalanceInternally Balanced
Compression Ratio11.0:1
Transmission Model4L65/70E
Rear Main Seal Style1 Piece
Fuel Delivery TypeFuel Injected
Horsepower625
Distributor IncludedCoil Packs
Oil Pan IncludedYes-Rear Sump
Part FitmentSemi Universal
Timing Cover IncludedYes
Spark Plugs IncludedYes
Intake Manifold TypeBluePrint Engines Cast Aluminum Intake
Vendor Part NumberBLS4278K4L7
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations