Build Planner
Pick a number. Get the parts list, in order.
Set your power goal, budget, reliability floor and how the car gets used. The planner picks the upgrades that fit, orders them the way they should actually be installed, and tells you what it does to the engine.
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Projected crank hp
$0
Total build cost
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Reliability after
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Parts in plan
Goal met — 399 hp for $3,750 (+99 hp over stock).
Needs a specialist budget
- Supporting cooling does not fit the budget but this build really needs it — plan another $1,600.
- Clutch / driveline does not fit the budget but this build really needs it — plan another $2,400.
- This build is aggressive for a daily driver — expect more downtime and shorter service intervals.
Intake & filter
Free-flow intake and filter.
Cheapest airflow gain and a 30-minute job.
Stage 1 tune
Calibration on stock hardware.
The single best dollar-per-horsepower step on stock hardware.
Downpipe
The single biggest turbo-car restriction.
Removes the biggest exhaust restriction on a turbo car.
Cat-back exhaust
Less restriction, real sound.
Frees the back half and sets the sound.
Stage 2 tune
Calibration matched to bolt-ons.
Recalibrates for the bolt-ons you just fitted.
Shop the parts filtered to your car, or check what owners report after installing them.