4.0L


Stage 7, The pinnacle of GTR precision and prestige, no OE items left to replace here. AMS lending a hand to machine a fine billet house for all this horsepower. 3,000 hp, 10,000 rpm all contained within the AMS Billet 4.0L block. GT1R 88mm crankshaft, Aluminum rods, Pistons, Headstuds and CNC ported head. Main studs supplied by AMS to hold the crank down during its symphonic climb all the way to redline and beyond.

Highlights

  • 3,000 Horsepower
  • 10,000 RPM
  • 4.0L Displacement

Specs


  • Approx Max HP: 3,000
  • Max RPM: 10,000
  • Displacement: 4.0L
  • Block: AMS Billet
  • Crankshaft: GT1R 88mm
  • Rods: GT1R Aluminum
  • Pistons: GT1R Manley
  • Wristpins: GT1R DLC
  • Headgasket: Proprietary GT1R
  • Main Studs: AMS
  • Headstuds: Proprietary GT1R
  • Cylinder Head: CNC Ported
  • Valvesprings: Ferrea Dual
  • Valves: Ferrea 1mm OS
  • Camshafts: Spec'd to application
  • Misc: Cylinder Head modified for improved sealing

4.3L


If you’ve come this far and you simply want to hurt feelings, crush spirits and set the bar higher than anyone else. You’re asking yourself if there is anything bigger than a 4.0L AMS? You’re greedy, and we like that. Stage 7 does come in one last package for someone like you. 4.3L, 9,000 RPM, 3,000 HP and the knowledge that on all of your competition is already in your rear view mirror. Break hearts and records at the edge of stage 7.

Highlights

  • 3,000 Horsepower
  • 9,000 RPM
  • 4.3L Displacement

Specs


  • Approx Max HP: 3,000
  • Max RPM: 9,000
  • Displacement: 4.3L
  • Block: AMS Billet
  • Crankshaft: GT1R 88mm
  • Rods: GT1R Aluminum
  • Pistons: GT1R Manley
  • Wristpins: GT1R DLC
  • Headgasket: Proprietary GT1R
  • Main Studs: AMS
  • Headstuds: Proprietary GT1R
  • Cylinder Head: CNC Ported
  • Valvesprings: Ferrea Dual
  • Valves: Ferrea 1mm OS
  • Camshafts: Spec'd to application
  • Misc: Cylinder Head modified for improved sealing

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