---
title: "ABConcept: 3D-Printed Rally Car Parts | AMT PostPro"
description: "ABConcept fitted its Zephyr rally car with 100+ HP MJF PA12 parts, vapor smoothed with PostPro, and ran them through 2,450+ km of the Rallye du Maroc."
canonical: https://amtechnologies.com/resources/case-studies/3d-printed-rally-car-parts/
updated: 2026-10-06
type: case-study
---
Case study · Automotive & motorsport

# How vapor smoothing helps 3D-printed rally car parts perform in extreme racing conditions

Rally racing pushes every component of a car to its limits. ABConcept set out to prove that 3D-printed parts could thrive there, equipping its Zephyr rally car with PA12 components printed on HP Multi Jet Fusion and finished with PostPro vapor smoothing.

[Read the full case study (PDF, opens in a new tab)](https://6983077.fs1.hubspotusercontent-na1.net/hubfs/6983077/Website/Case%20Studies/AMT_CS_ABCONCEPT.pdf) [Test your parts](https://amtechnologies.com/test-your-parts/)

Published Dec 10, 2025 Free download, no form

![ABConcept rally car throwing up a plume of dust on a desert stage](https://amtechnologies.com/img/resources/cs-abconcept-800.webp)

Photo · The ABConcept Zephyr rally car at the Rallye du Maroc.

- **Customer**: [ABConcept](https://abconcept.ch/)
- **Industry**: [Automotive & motorsport](https://amtechnologies.com/industries/automotive/)
- **Application**: Rally car components
- **Printing**: HP Multi Jet Fusion
- **Material**: PA12
- **Finishing**: [PostPro vapor smoothing](https://amtechnologies.com/products/vapor-smoothing/)
- **Published**: Dec 10, 2025

## Built for the stage

The Zephyr carried more than 100 PA12 components printed with HP MJF, and those parts faced more than 2,450 km of intense terrain at the Rallye du Maroc.[1]

To meet the mechanical demands of high-speed, high-stress racing, ABConcept made [PostPro vapor smoothing](https://amtechnologies.com/products/vapor-smoothing/) part of its workflow. The finishing step enhances durability, seals surfaces and improves resistance to wear, oil and debris, which makes it a key production step for motorsport applications.[1]

## The result

The combination of MJF printing and automated vapor smoothing shows how additive manufacturing can deliver strong, lightweight and reliable car components built for extreme conditions.

Results

- 100+ PA12 components on the Zephyr rally car[1]
- 2,450+ km of the Rallye du Maroc[1]

Full case study

The complete story as a PDF. Free, no form to fill in.

[Download the PDF (opens in a new tab)](https://6983077.fs1.hubspotusercontent-na1.net/hubfs/6983077/Website/Case%20Studies/AMT_CS_ABCONCEPT.pdf)

Related

- [PostPro vapor smoothing](https://amtechnologies.com/products/vapor-smoothing/)
- [Automotive & motorsport applications](https://amtechnologies.com/industries/automotive/)
- [All case studies](https://amtechnologies.com/resources/case-studies/)

Test your parts

## Send us a part. See it smoothed.

We vapor smooth your own parts and send them back with the results. No cost to evaluate · Parts returned · Typical turnaround 2–3 weeks[2]

[Test your parts](https://amtechnologies.com/test-your-parts/) [See the systems](https://amtechnologies.com/products/vapor-smoothing/)

## Sources

1. [How vapor smoothing helps 3D-printed rally car parts perform in extreme racing conditions (ABConcept case study)](https://amtechnologies.com/resources/case-studies/3d-printed-rally-car-parts/) · AMT · Dec 10, 2025
2. [PostPro benchmarking: send us your 3D printed parts](https://benchmarking.amtechnologies.com/) · AMT · read Oct 6, 2026