1. Home
  2. BluePrint Engines
  3. BluePrint Engines LS Series Engines
  4. LS 427 Engines

LS 427 c.i. 625 HP Engine and TKX Manual Transmission BLS4273KTKX

LS 427 c.i. 625 HP Engine and TKX Manual Transmission BLS4273KTKX

LS 427 c.i. 625 HP Engine and TKX Manual Transmission BLS4273KTKX

Price: $26,399.00
  • SKUBLS4273KTKX
- +

⚠ WARNING: Cancer - www.P65Warnings.ca.gov

Other products by BluePrint Engines

Description

BLS4273KTKX LS 427 c.i. 625 HP Engine and TKX Manual Transmission - Standard Edition Builder Series with Polished Pulley Kit - Fuel Injected

*Stock may be limited please call for availability before ordering* 
*Prices include shipping to a business address with a forklift or loading dock* 
*Residential addresses or lift gate deliveries please call for a quote*

GM LS Compatible 427 c.i. Engine and TKX Manual Transmission - 625 HP - Standard Edition Builder Series with Polished Pulley Kit - Fuel Injected

SKU: BLS4273KTKX

Horsepower & Torque: 625 Horsepower / 565 ft. lbs. Torque

Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads

Compression Ratio: 11:1

Camshaft: Hydraulic Roller Cam - .624 Intake / .624 Exhaust Lift and 239 Intake / 255 Exhaust Duration @ .050 – 114 LSA

Pistons: Forged

Crankshaft: Forged Crank – 4.125" Stroke and Forged 6.125" Rods




*This engine is pictured with an Aluminum Block will come with a Cast Iron Block and Holley Front Drive Pulley Kit.

Description:

  • Horsepower & Torque: 625 Horsepower / 565 ft. lbs. Torque
  • Compression Ratio: 11:1
  • Aluminum Heads
  • Hydraulic Roller Cam
  • Forged Crank
  • Forged Pistons

Block:

  • BluePrint Engines High Strength Cast Iron Block
  • Increased Deck Thickness and Strength Webbing
  • Extended Cylinder Skirt
  • Priority Main Oiling
  • 6-Bolt Main
  • 1-Piece Rear Main Seal
  • Improved Water Jacket Design
  • Utilizes OEM LS3 Front and Rear Covers

Rotating Assembly:

  • New Forged Crankshaft
  • 4.125" Stroke
  • Forged 6.125" Connecting Rods
  • Forged Pistons
  • Internally Balanced

Cylinder Heads:

  • BluePrint Aluminum Cylinder Heads - PS8015
  • 72cc Chamber
  • 2.165" Intake - 1.600" Exhaust Valves
  • 259cc Intake - 102cc Exhaust Runners

Cam Specs:

  • Hydraulic Roller Cam
  • .624 Intake - .624 Exhaust Lift
  • 239 Intake - 255 Exhaust Duration
  • @.050-114 Degree Lobe Separation

Ignition Timing:

  • ECM Supplied with Calibration

Also Includes:

  • Drive by Wire Throttle Body
  • LS3 Intake Manifold
  • 42# Injectors and Return-less Fuel Rail
  • Harmonic Balancer
  • Valve Covers
  • Retro Fit Oil Pan
  • Timing Cover
  • Coil Packs
  • All Sensors Required for Engine to Run
  • Spark Plug Wires & Wiring Harness
  • Gas Pedal
  • Polished Front Accessory Drive with LT1 Style 150-amp Alternator, LT1 Style Water Pump, Type II Power Steering Pump with Baffled Edges, and Compact Style A/C Compressor 

Assembled with Complete TKX Transmission Package:

  • Mcleod Super Street Pro Twin Disc Clutch
  • Hydraulic Throw Out Bearing
  • Bell Housing
  • Billet Flywheel
  • Starter
    • First Gear Ratio: 2.87:1
    • Second Gear Ratio: 1.89:1
    • Third Gear Ratio: 1.28:1
    • Fourth Gear Ratio: 1.00:1
    • Fifth Gear Ratio: 0.68:1

Notes:

  • Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars
    Not for use in pollution-controlled vehicles or in dry sump applications.
  • The Included LS controller package is for engine control only. Does not contain any transmission or body control. The ECU comes with calibration that is optimal for our engine, however, please note that vehicle parameters such as gearing, tire size, vehicle weight, air intake, headers, etc. may necessitate additional tuning once installed into your specific vehicle. The included ECU is unlocked for further refinement at your local dyno shop if required.
  • BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU / tuning.
  • Engine/Trans Package Ships assembled

Customer Reviews

Write a Review