DESIGN YOUR FIRST 3D PRINTED CAR PART TODAY

3d printed spark plug wire holder
🎁 Free Download: Use our premade spark plug wire holder to speed up your design with just a few clicks. The design features:

✅ Circular style clip to hold spark plug wires neatly in place
✅ Stronger, cleaner design than stock clips
✅ Editable file so you can customize it

⬇️ Grab the editable Shapr3D CAD file here
⬇️ OR Download the Printable STL model here

If you want to design your first car part, starting from a blank slate can be tough.

So we provided you with a FREE design you can quickly modify that will help you learn the basics of automotive CAD design.

START SIMPLE

The best way to get started is with a very basic design. We picked a spark plug wire separator clip you can modify for your project car in just a few simple steps.

bmw e30 spark plug wire holder original

1. DOWNLOAD SHAPR3D

Designing your first car part doesn’t need to be complicated. Which is why you should download [Shapr3d here].

Shapr3d is by far one of the easiest and most powerful CAD software programs we’ve tried.

It even works with an iPAD and Apple pencil, but you can also download a desktop version too.

2. IMPORT THE FREE SHAPR3D FILE

The design has already been created, so all you have to do is download and import the design [grab here] into Shapr3d with the import feature.

3. MEASURE YOUR PART

Grab a measuring tool like a caliper or ruler and start taking measurements of your spark plug wire clip.

Measure Your Car Part for CAD Design

4. MODIFY THE SIZE

Use the history tool in shapr3d on the right hand menu to modify the sketch size. You can adjust the length, width, or diameter of the circles.

If you want the spark plug wire holder to be thicker, you can also modify the height or by clicking the Extrusion in the history panel.

Extrude car part in Shapr3d with History tool

You can also modify the fillets to provide a tigher fit.

Shapr3d modify car part fillet with history tool

5. EXPORT AND PRINT THE DESIGN

Use the Shapr3d export feature to export the design to an STL file and add it to your 3d printing software to print.

💡 Note: The free version of Shapr3d exports in lower resolution. If the shape isn’t smooth enough, give the Shapr3d trial version a try.

You can also send your part to a print on demand service like PCBway.com if you don’t have a 3d printer.

7. TEST FIT THE DESIGN

Here’s our first print. Let’s check the fit:

Boom. Fits just right.

If your size is slightly off go back to Shapr3D and adjust the scale using the history function.

⚡ YOU HAVE YOUR FIRST CAR PART, NOW WHAT?

Transform your build by taking your design skills to the next level.

Join a 1-Day Car Part Design Workshop you’ll go from basic car parts to more complex that includes:

✅ Advanced CAD & modeling
✅ Build custom parts you'll love
✅ BONUS Intro to 3d Printing with pre-made car part designs

👉 Claim Your Spot in the Workshop
Javier Solis

Hi, I’m Javier Solis, a Sr. Product Manager at Extreme Networks with 25+ years of experience in tech. I enjoy solving complex problems—and outside of work, I spend my time building and modifying project cars, especially classic BMWs and Datsuns with my wife Ashley.

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3D PRINTING VS BUYING CAR PARTS: WHAT’S ACTUALLY CHEAPER?