BluePrint MLL-BLS4273KB4L7 Standard Edition GM LS Compatible Builder Series – EFI – Black Pulley Kit
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BluePrint Engines 427 c.i. GM LS Compatible Builder Series – Standard Edition – Fuel Injected – 4L65/70E Automatic Transmission – Black Pulley Kit. Includes 30-Month / 50,000 Mile Warranty & Dyno Tested
Features:
- Standard Edition GM LS Compatible Builder Series – EFI – Black Pulley Kit
Attributes:
| Torque | 565 |
| Intake Manifold Type | LS3 Intake |
| Quantity | EA |
| Pulley Kit Included | Yes – Black – LT1 Style 150amp Alternator, LT1 Style Water Pump, Type II Power Steering Pump with Reservoir, Compact Style Air Conditioning Compressor. |
| Transmission Model | 4L65/70E |
| Transmission Type | Automatic |
| Fuel Pump Included | No |
| Recommended Stall Converter | 2200+ RPM |
| Air Cleaner Included | No |
| Water Pump Included | Yes |
| Firing Order | 1,8,7,2,6,5,4,3 |
| Spark Plug Wires Included | Coil Packs |
| Recommended Spark Plug | CCH9405 |
| Recommended Spark Plug Gap | .045 in. |
| Spark Plugs Included | Yes |
| Distributor Vendor | BluePrint Engines |
| Distributor Included | Coil Packs |
| Recommended Octane Fuel | 91+ Octane |
| Carb/Fuel Injection Included | Yes |
| Fuel Delivery Vendor | Holley Terminator EFI |
| Fuel Delivery Type | Fuel Injected |
| Intake Manifold Vendor | BluePrint Engines |
| Intake Manifold Included | Yes |
| Valve Covers Included | Yes |
| Oil Pan Included | Yes-Rear Sump |
| Timing Cover Included | Yes |
| Timing Requirements | ECM Supplied with Calibration |
| Recommended Harmonic Balancer | Non-Weighted |
| Harmonic Balancer Included | Yes |
| Recommended Flexplate/Flywheel | Non Weighted BPP12654640 – BPPLS1611 |
| Flexplate/Flywheel Included | Yes |
| Cylinder Head Vendor | BluePrint Engines |
| Cylinder Heads | LS3 Aluminum Cylinder Heads |
| Cylinder Heads Included | Yes |
| Engine Balance | Internally Balanced |
| Pistons | Forged |
| Crankshaft Vendor | BluePrint Engines |
| Cam | Hydraulic Roller – .624 Intake / .624 Exhaust Lift – 239 Intake / 255 Exhaust Duration -@.050-114 LSA |
| Rotating Assembly | Forged Crank – 4.125 in. Stroke and Forged 6.125 in. Rods |
| Rear Main Seal Style | 1 Piece |
| Block Description | BluePrint Engines High Strength Cast Iron (LSX Style) Block – 6 Bolt Main – 4.0665″ Bore |
| Compression Ratio | 11.0:1 |
| Horsepower | 605 |
| Title | BluePrint Engines GM LS Compatible 427 c.i. Engine and 4L65/70E Automatic Transmission – Standard Edition Builder Series – Black Pulley Kit – Holley Terminator X EFI System |




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