Using the planner

Swapping a part

Open the slot and pick any alternative. Each one shows its price range, its tier (budget, mid or premium), its honest pros and cons, and a confidence level for how much we know about it on your chassis.

Adding your own part

If you have something that is not in our catalogue, add it with a name and what it cost. It counts in the totals and the warnings treat the slot as filled.

Marking a slot as owned

Use this for anything you already have. The slot stays visible so the build order still makes sense, the warnings know it is there, and it contributes nothing to the total.

Marking a part installed

Tick it installed and enter what you actually paid. This is what turns the plan into a build log: planned versus actual appears per phase, so the next phase gets budgeted on real numbers rather than our estimates. Logging what you paid is a Pro feature.

Power target

Setting a power target changes which warnings fire. Above roughly 350 hp the clutch and drivetrain rules activate, because that is where the factory parts stop being comfortable.

Wheels and offsets

Entering your wheel widths, offsets and tire width lets the offset rules run against your actual numbers, which is where most fitment problems live. The same logic is available as a free standalone tool.

The pre-event checklist

Generated from your build. If you have an angle kit it tells you to check for witness marks at full lock; if you have a hydraulic handbrake it tells you to bleed that circuit; if your power target is high it tells you which spare to carry. It also includes your chassis' own known weak points. A printable version is a Pro feature; the checklist itself is free.

Sharing and forking

Every saved build gets a public page you can share. Anyone can fork it to use as a starting point for their own. Pro adds private builds if you would rather not share.