- 1,599
- Brunswick, Frederick County, Maryland
- nascar61799
I'd like to see some tuning upgrades from GT1 to GT5 make a return to GT6:
- Engine Balancing upgrade. (GT1-GT4)
- Sport/Semi-Racing/Racing Flywheel upgrades. (GT1-GT5)
- Displacement Increase upgrade. (GT1-GT4)
- Sport/Racing Intercooler upgrades. (GT1-GT4)
- Port Polishing upgrade. (GT1-GT5) [Note: called Port Grinding in GT1]
- Heavy-Duty Single-Plate Clutch upgrade. (GT1-GT5)
- 1-Way/1.5-Way/2-Way Limited-Slip Differential upgrades. (GT1-GT5)
- Sport/Semi-Racing Suspension upgrades. (GT1-GT5)
- Original Suspension/Turbo Kit upgrades. (GT4)
- Stage 4 Turbo Kit upgrade. (GT4)
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