Build configurator
Spec the car, not the receipt
Everything below feeds a deterministic rule set. No guessing, no AI hand-waving — change an input and you will see exactly which requirement moves.
Vehicle
Chassis and application labels are broad. If your year or variant differs, edit the year field — coverage is approximate.
N54 3.0L twin-turbo — Twin small turbos with a robust factory bottom end for its era; engine condition and torque delivery become increasingly important at higher output.
- • 2007-2010 sedans/coupes are N54; 2011+ sedans moved to N55 — verify your engine code.
- • Very broad aftermarket support; confirm sedan vs coupe piping differences.
Power goal
Stock N54 is roughly 255 whp at the wheels.
Stock-turbo planning threshold (est.) ≈ 380 whp · stock-engine planning threshold (est.) ≈ 700 whp.
Common East-coast pump ceiling.
Current mods
Check anything already on the car. Installed items drop out of the cost estimate and raise your readiness score.
Tuning
Intake & Charge Air
Exhaust
Cooling
Fueling
Turbo
Ignition
Drivetrain
Engine Internals
Chassis & Brakes
Maintenance
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