Event confirmation required
Start with
your organizer.
Driving schools and club days do not share one universal number specification. Your registration and event instructions are the starting point.
Other HPDE / club track day
at a glance.
Dimensions below refer to the actual character, not the outside panel. Consult the linked official text for the complete provisions.
| Detail | What to plan for |
|---|---|
| NASA HPDE reference | CCR §11.4.14 says the car should show its assigned number, if any, on both sides. |
| Character height | That clause does not provide a universal minimum numeral height. |
| Other organizers | Check that club’s actual instructions for height, positions, permitted materials, and any run-group identifier. |
| Our builder | Starts at 8-inch numerals and requests organizer information. That is a design default, not an HPDE-wide rule. |
Source: Your organizer’s current event instructions. The full rule and your event supplements take precedence over this summary.
PLAN THE WHOLE CAR
Every position.
Accounted for.
Measure a clear area at each location before settling on a layout. A door handle, body crease, trim strip, or small front/rear area can change the available footprint.
Position reference: Your organizer’s current event instructions. For magnetic placement limitations, read Magnum’s installation guidance.
Confirmed from the actual instructions
Position list is a planning diagram, not an inspected installation or a scale drawing.
Get the instruction, not just the event name.
Before you build, collect the organizer’s name, the date, your assigned number, and a link or written instruction for identification. Check whether any additional marks or material restrictions apply. A run group is not automatically a racing class.
Before a production proof
- Check your registered number and any class or run-group identifier.
- Confirm current event requirements and required official decals.
- Measure clear width and height on the actual car.
- Record the finish and check the selected attachment material.
We check the actual characters, stroke widths, positions and supplied fit measurements on the production proof. The on-screen car illustration does not complete those checks.
Your registered class.
Use the code on your accepted entry. These links select artwork labels; they do not determine vehicle eligibility. Regional and supplemental classes can be entered manually.
A few useful answers.
Can I choose any number I like?
Confirm the number through your event’s registration process. A design you create here does not reserve an entry number or change the organizer’s assignment. Official reference ↗
Can a magnetic kit work on every car?
No. It needs a suitable magnetic surface and full contact; aluminum, fiberglass, and carbon-fiber panels are not suitable magnetic substrates. Check the actual mounting area and finish. Magnum care and application guidance · Our material guide.
Does this include a guarantee of event compliance?
Our Race Ready service checks number-graphics requirements and provides a correction promise for our documented work. The organizer retains final approval; graphics do not certify vehicle classification, equipment or technical inspection. See our service terms.
Your number, with a plan.
Send your event, car and registered number for a complete graphics quote.