LSx 427ci Boosted Complete Engine

$18,499

The LSx 427ci Boosted Complete Engine was built for customers that are looking to run 20-30 psi of boost and 1000hp +.

Compression Ratio: 9.5:1
Operating Range: 2500 – 6700rpm
Required Fuel: 91+ Octane Pump Gasoline

BLOCK SPECIFICATIONS

Block:

  • New GM LSx Cast Iron Block
  • Zero Decked
  • Bored 4.125”
  • Honed with Torque Plates and Pressure Washed
  • New Durabond Cam Bearings Installed
  • Line Honed
  • ARP Main Studs

Pistons:

  • Wiseco Forged Pistons, tool steel wrist pins

Bearings:

  • Clevite H-Series Main and Rod Bearings

Lifters:

  • Comp Cams Custom Hydraulic Roller

Covers:

  • GM Oil Pan (Camaro, Corvette, GTO or Truck)
  • GM Timing Cover
  • GM Rear Cover
  • GM Lifter Valley Cover
  • GM Valve Covers

Damper:

  • Powerbond SFI
  • ARP Damper Bolt

Crank:

  • Callies Dragon Slayer 4340 Forged Steel
  • 4.000” stroke
  • Internally Balanced Front and Rear

Rods:

  • Callies 4340 Ultra Forged H-Beam
  • 6.125” Length
  • ARP 2000 Rod Bolts

Rings:

  • Stainless Steel Rings Gapped for Boost

Camshaft:

  • Comp Cams Hydraulic Roller

Timing Sets:

  • Cloyes Billet Roller Hex Adjust Z-Chain

Oil Delivery:

  • Melling Performance
  • GM Pick Up Tube
  • GM Windage Tray

Gaskets:

  • Cometic MLS Head Gaskets .051”
  • GM Cover Gaskets

CYLINDER HEAD SPECIFICATIONS

Type:

  • Golen Aftermarket LS Aluminum CNC Ported
  • Three angle performance valve job

Intake Valves:

  • Stainless Steel 2.20”

Exhaust Valves:

  • Extreme Duty Inconel Stainless Steel 1.6”

Head Bolts:

  • ARP Performance Heads Studs 6-bolt

Combustion Chamber:

  • 70cc

Flow:

  • 380CFM @ .650” Lift

Spring Kit:

  • Polished Double Valve Spring
  • Titanium Retainers and Hardened Locks

Rocker Arms:

  • GM Factory 1.7 Ratio, Comp Cam Trunion Upgrade

Pushrods:

  • Smith Brothers 3/8 .083” Wall Hardened

Ignition System:

  • Autolite Racing Spark Plugs

 

Dyno Test Service:

  • Run Engine for Full Break In and Power Test
  • 2 Oil Changes using Joe Gibbs Break In Oil
  • Graphs Listing HP, Torque and all Engine Vitals

Additional information

Weight 500 lbs
Dimensions 38 × 26 × 36 in