CHEVY LS7 427ci 650hp LONG BLOCK

CHEVY LS7 427ci 650hp LONG BLOCK

Base Price Wet Sump $12,499 / Dry Sump Z06 $13,199

The 427ci makes max power and torque with a hydraulic cam which is very street able but also gives you the sound you are looking for!!

Peak Horsepower: 650bhp @ 6800 rpm
Peak Torque: 580lb/ft @ 5000 rpm
Compression Ratio: 11.5:1
Operating Range: 2500 – 6800rpm
Required Fuel: 91+ Octane Pump Gasoline 



  • New GM LS7 Aluminum Block
  • Bore Size 4.125"
  • Zero Decked
  • Honed with Torque Plates and Pressure Washed
  • New Durabond Cam Bearings Installed
  • Line Honed
  • ARP Main Studs


  • Mahle Forged pistons with Anti-Friction Coating


  • Clevite H-Series Main and Rod Bearings


  • Comp Cams Hydraulic Roller


  • GM MLS Head Gaskets


  • Callies Comp Star 4340 Forged Steel
  • Stroke 4.000”
  • Internally Balanced Front and Rear


  • Callies Comp Star 4340 Forged Steel H-Beam
  • 6.125” Length


  • Mahle Plasma Moly


  • Comp Cams Hydraulic Roller

Timing Sets:

  • Cloyes Billet Hex Adjust Roller

Oil Delivery:

  • Melling Select Performance



  • Trick Flow LS7 Aluminum CNC Ported

Intake Valves:

  • Stainless Steel 2.16”

Exhaust Valves:

  • Stainless Steel 1.6”

Head Bolts:

  • ARP Performance


  • GM MLS Head Gaskets
  • GM Cover Gaskets

Combustion Chamber: 

  • 70cc


  • 360CFM @ .600” Lift

Spring Kit:

  • PAC Racing Polished Double Valve Spring
  • Light Weight Tool Steel Retainers and Hardened Locks

Rocker Arms:

  • GM Factory 1.7 Ratio


  • Smith Brothers 3/8 .083” Wall Hardened

We are able to build your engine to match just about any specs you desire, so if you do not see it just ask us! Each Golen Engine comes standard with a three year no mileage limit warranty to keep you confident and covered. When you purchase one of our LS HP or Hot Rod Series Street Engines you will receive a full spec sheet listing the exact components your engine was built with. We will also provide you with a complete Set Up Guide as well as full phone tech support to aid you with the installation process. It is mandatory for you to contact Golen Engine Tech Support before starting your engine for the first time and you can reach our Tech Support Line at 1-800-591-9171 ext 2. Each Golen Engine Performance Street Engine comes standard with a “Three Year no Mileage Limit Warranty” to keep you confident and covered! Feel free to contact us anytime for help choosing the perfect performance engine combination!!