15% off all Engine and transmission combinations till the end of August. Use coupon code Engines15
Custom 3D Parts
About KNJ 3D Printing

Small Parts. Big Detail. Built for Custom Projects.

KNJ 3D Printing is focused on highly detailed automotive-style parts, custom model components, and hard-to-find pieces that help builders complete their projects with more personality, precision and realism.

Need a Custom Part?
Our Story

Designed for the builders who notice the tiny things.

A build often comes down to the details: the wheel style, the engine look, the accessories that makes your build complete. Our goal is to make those detail parts easier to find, easier to request, and easier to add to your project.

What We Create

Parts with purpose, not filler.

Carburetors

Engines

Wheels

Distributors

Engines

Wheels

Custom Requests

Send a sketch, reference photo, dimensions, or product idea.

How We Work

A simple path from idea to printed part.

01

Browse or Request

Choose from existing product categories or send a custom part request.

02

Review the Details

We check the idea, product direction, or reference details before moving ahead.

03

Print with Purpose

The part is prepared with the project use and visual detail in mind.

04

Ready for Your Build

Your order is packed and sent out so it can become part of the final build.

Have an idea?

Let’s turn it into a custom 3D printed part.

Start a Request
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