Build Sheet (2005 Pontiac GTO)

ENGINE BUILD SHEET

Vehicle: 2005 Pontiac GTO
Engine Platform: LS-Based Stroker
Build Type: Performance Street / Strip
Displacement: 408 Cubic Inches
Reluctor: 24x Reluctor Wheel

Short Block Assembly

  • Pistons: 3cc Flat Top

    • Part #: 25-SS408BRA-3CC

  • Crankshaft: Forged stroker crankshaft

  • Connecting Rods: Forged performance rods

  • Block: 2004+ LS block, fully machined and prepped

  • Fasteners: ARP Hex Head Bolt Kit (2004+ blocks)

  • Bearings: Performance-grade main and rod bearings

  • Balancing: Precision-balanced rotating assembly

  • Compression Ratio: Optimized for performance pump gas (final ratio dependent on head chamber volume)

Camshaft & Valvetrain

  • Camshaft:

    • TSP Stage 4 Cathedral Camshaft – Tsunami

  • Valve Springs:

    • TSP .660” Polished Dual Spring Kit

    • PAC valve springs

    • Titanium retainers

    • PRC integrated seat & seal

  • Cam Kit:

    • Texas Speed & Performance Dual Spring Cam Kit
      (Cathedral Port – LS1 / LS2 / LS6)

  • Pushrods:

    • Texas Speed & Performance 7.400” Chromoly Pushrod Set (16)

  • Rocker Arms:

    • Comp Cams Retro-Fit Rocker Arm Trunnion Kit
      (GM LS1–LS3 Engines – P/N 13702-KIT, not for LS7)

Timing & Engine Hardware

  • Camshaft Retainer:

    • TSP LS Camshaft Retainer Plate & Bolts Kit

  • Front Cover & Gaskets:

    • TSP Front Cover and Camshaft Gasket Kit

  • Harmonic Balancer Bolt:

    • GM LSX Harmonic Balancer Bolt

  • Reluctor Wheel:

    • 24x Reluctor Wheel (ECU compatible)

Oiling System

  • Oil Pump:

    • Melling High Pressure Oil Pump (97+ LS engines)

  • Oil system clearanced, cleaned, and verified

  • Pre-lubed prior to final assembly

Gaskets & Sealing

  • Head Gaskets:

    • TSP LS2 / L92 / LS3 / L99 Cylinder Head Gaskets

    • Sold individually and matched to build specs