Orange County, CA · Nationwide service
Custom
automotive
part design.
No CAD file? No problem.
Send a photo, a sketch, or the broken part itself. RPM Custom Design turns custom, broken, or discontinued automotive parts into production-ready 3D models, then coordinates prototyping and manufacturing through qualified partners. Orange County based, serving builders, shops, and restorers nationwide.
- Photo or sketch is enough
- Files only or full manufacturing
- You own every file
Drilled brake rotor
Scanned & rebuilt in CAD
Start here
What do you need help with?
No CAD file required. A photo is enough to begin.
No CAD file required
No CAD file?
No problem.
Most manufacturing sites need you to already have a 3D file. We start earlier than that. Send what you have and tell us what the part needs to do, and we build the model from there. Manufacturing is optional.
A photo
Phone photos from a few angles.
A sketch
Napkin drawings count.
Measurements
Tape measure or calipers.
The part itself
Broken, worn, or complete.
Orange County, CA
Nationwide shipping
3 to 10 business days
100% yours
Three ways to get your part made
Start with a scan, a photo, or a sketch. End with files you own, and, if you want, finished parts in your hands.
From a single bracket to a full restoration one-off
- Brackets & mounts
- Intake & induction parts
- Interior trim & panels
- Engine bay hardware
- Discontinued OEM replacements
- Housings & enclosures
- Adapter plates
- Body & aero components
- Suspension hardware
- Cooling & ducting parts
- Fixtures & shop tooling
- Restoration one-offs
Find the page that matches your problem
- My part is discontinued or brokenObsolete, cracked and unavailable parts recreated as accurate, manufacturable CAD.
- I have photos, a sketch or measurementsSend what you have, phone photos and caliper dimensions are a valid starting point.
- I need a custom bracket, mount or adapterMounting plates and adapters designed around the space you actually have.
- I need a part 3D scannedAutomotive 3D scanning and reverse engineering into clean solid geometry.
- I need the part actually madeManufacturing-ready CAD for CNC machining, laser cutting and 3D printing.
- I'm still figuring out what I needGuides on measuring, scanning, file formats and choosing a manufacturing process.
Six steps from broken part to finished part
- 01Step
Send it in
Share photos, the vehicle year/make/model, and what the part needs to do. Ship or drop off the physical part if you have one.
- 02Step
Scan or measure
The part is 3D scanned or hand-measured. Broken and incomplete parts are reconstructed from the surfaces that survived.
- 03Step
Model in CAD
A clean, editable 3D model is built with real fitment, wall thickness, and hardware callouts, not a scan mesh.
- 04Step
Review & revise
You see renders and dimensions before anything is made. Revisions happen here, where they are cheap.
- 05Step
Prototype
Optional fit-check prototype in printed polymer so the part is confirmed on the vehicle first.
- 06Step
Manufacture or hand off
Production runs through qualified CNC, printing, or fabrication partners, or you take the files and run them yourself.
Representative work
Discontinued part reproduction
Discontinued interior bracket
- Starting point
- A cracked plastic bracket no longer sold by the dealer, with one mounting ear missing.
- Approach
- The surviving geometry is scanned, the missing ear reconstructed from the mating panel, and the failure area thickened.
- Delivered
- STEP + STL model, dimensioned drawing, printed fit-check part.
3D printing (reinforced nylon)
Custom part design
Custom intake adapter
- Starting point
- An off-the-shelf intake that does not line up with a swapped throttle body.
- Approach
- Both mating faces are measured, an adapter is modeled around bolt pattern and clearance, then checked against the engine bay envelope.
- Delivered
- Machining-ready STEP, drawing with tolerances, CNC quote coordination.
CNC machined aluminum
Software & capture
- SolidWorksParametric CAD
- Autodesk FusionCAD / CAM
- Structured-light scanningPart capture
- Mesh reconstructionScan to solid
Delivered file formats
- STEPNeutral solid
- STL / 3MF3D printing
- IGESNeutral surface
- DXFFlat profiles
- PDFDimensioned drawing
- Native CADEditable source
Cost, turnaround, shipping, and file ownership
Every part is quoted before work starts. Simple brackets and adapters are usually a flat design fee; multi-part assemblies, complex surfacing, and full reproduction programs are quoted after reviewing photos and the part itself. Manufacturing is quoted separately so you always see the design cost and the production cost as two numbers.
Yes. Discontinued car part reproduction is a core service. A surviving part, even cracked, warped, or incomplete, is scanned or measured, rebuilt as a clean 3D model, and prepared for 3D printing, CNC machining, or fabrication.
The part is captured as a dense mesh, then that mesh is used as reference to rebuild the geometry as a real CAD solid with true flats, holes, radii, and bolt patterns. You get an editable model, not a raw scan file that no shop can work from.
Not always. Many jobs start from clear photographs plus a few caliper measurements. For parts with critical fitment or complex curvature, shipping the part in produces a far more accurate result. Parts are returned with the completed files.
Yes. File-only delivery is a standard option. You receive STEP, STL, and drawing files you own and can send to any shop you like.
Production is coordinated through qualified CNC machining, 3D printing, and fabrication partners. RPM Custom Design handles the design, the files, and the coordination so you deal with one point of contact.
Get a Quote
Ready to get your part made?
Send photos, the vehicle year, make and model, and what the part needs to do. You get a written quote before any work starts.