About the project

Built by an owner,
for owners.

FLAT·SIX is a free, open-source garage for the Boxster & Cayman — made by someone who just wanted a better way to look after his own.

The story

Why this exists.

I drive a 981 Boxster and do my own maintenance. When I started, the information I needed was everywhere and nowhere — buried in forum threads, scanned PDFs, half-remembered part numbers and a dozen open browser tabs.

The knowledge existed; it just wasn't in one place, and it was never scoped to my exact car. So I built the thing I wished I had: one garage that knows my generation, keeps my whole service history, and puts fault finding, specs and plans a click away — with an AI that can help.

Then I made it free and open source, because every Boxster and Cayman owner deserves the same tool. It's a labour of love, built in evenings and weekends — no ads, no catch. Just an owner giving the DIY community something genuinely useful.

The car that started it
981 Boxster
Boxster · 981
flat-six · mid-engine · manual
Daily

What it stands for.

A few things we're not willing to compromise on.

$0
Free forever

No paywalls, no premium tier. Every feature, for everyone.

Open
Open source

All on GitHub. Read it, fork it, or help build it.

Private
No ads, no tracking

Your garage is yours. Nothing sold, nothing mined.

You
Owner-first

Built around how owners actually work on these cars.

Get involved

Help build it.

If you've got an idea, found a bug, know the cars well, or want to add your generation — contributions are genuinely welcome. This gets better with every owner who pitches in.

Share an idea View on GitHub
Add a generation

Know the 986, 718 or 997 inside out? Help bring them into the garage.

Sharpen the data

Torque figures, part numbers, fault patterns — corrections always welcome.

Write a guide

Done a job on your car? Turn it into a guide the next owner can follow.

Come build your garage.

It's free, it's open, and it's made for people who love these cars as much as you do.

Start your garage