This mind blowing GT - R has a few subtle upgrades that really make it the ultimate supercar including a Litchfield stage 4.25 that includes:; The Stage 4.25 Power upgrade includes:; • Milltek Stainless Steel Downpipes; • Improved boost control with custom Ecutek code; • Adjustable boost using the steering wheels cruise control button; • Revised ignition control, variable valve timing and fuel maps; • Reduced fuel consumption (especially on partial throttle conditions); • Increase in both power and torque across the whole rev range; • Litchfield RACEROM Switchable maps for
different fuel
octane ratings; • Litchfield Custom Launch Control settings when used with Gearbox Software upgrade.; Along with the important Bell - housing upgrade.