Description

Boost Ready® 408

6.0L LQ4 Engine | Ideal for 900 HP builds

• We start with a seasoned 6.0 LQ4 Engine
• Bored and Diamond Honed to a 408 ci
• Forged 4.0″ Stroke 4340 Steel Crankshaft
• Available in gen III 24 tooth or Gen IV 58 tooth Applications
• Forged 6.125″ 4340 Shot Peened I-Beam Rods with ARP Hardware
• Forged Power Pack Pistons
• Cometic MLX Head Gaskets
• Available with Stock Cathedral Port  or NEW LS3 style Rectangle Port Head Castings
• Can upgrade to Ported Heads on both Cathedral and Rectangle Applications
• CHE Trunnion kit
• Melling High Volume M365 Oil Pump
• Includes Factory timing cover and truck oil pan ( Aftermarket options Available at checkout)
• Safely Rated For Turbo or Supercharger Applications up to 900 HP
• Your specific power ratings will depend greatly on setup and tuning
• This engine must have custom tuning performed in order to operate properly!!
• This engine comes with a 1 year/12k mile warranty against manufacturers defects inspection of engine upon failure will be required See warranty for details***
• Engine is designed for use in off road non emission compliant vehicles.
• Optional Accessories Available upon Request
  • Aftermarket swap oil pan in finish of Natural or Black  Powder Coating)
  • Aftermarket Timing Cover in Natural or Powder Coating
  • Aftermarket Valve Covers in Natural

  **** Also Look at our Line of Performance Transmissions to go with the new engine!!  Our Street and Pro Level Units are available Now *****

  ***** Please inquire about availability while we strive to keep these in stock there are times when there may be a lead time********

Featured in the burnout wars Broclass Builds in the 2026 season