Free & open source · Boxster & Cayman

Know every system.
Keep every record.
Ask any AI.

A multi-car garage for the 987 and 981: a full 3D X-ray, fault finding, service history, plans and DIY wheel & alignment tools — connected to Claude, OpenAI, or Gemini.

Start your garage See what it does
X-rayAll systems, stripped987 · 981
Full 3D X-ray of every system
X-ray
every system stripped
200
fault codes indexed
AI
Claude · OpenAI · Gemini
The Inspector

See it from the
outside in.

Orbit a real 3D model in your colour, strip it to every assembly in X-ray, or follow coolant, fuel, air and wiring through the car — each part tied to numbers, torque and intervals for your generation.

Explore the 3D viewer
Layer 01 · 3D model
Boxster 3D model
Layer 01

Orbit & recolour

Drag to spin, scroll to zoom, and switch the paint to your spec — the body repaints live.

Layer 02

Where every part lives

Trace coolant, fuel, air, exhaust and wiring, then open any system for part numbers and torque.

Everything you need

Everything in one garage.

Seven tools that keep your car's whole life in one place — history, plans, faults, DIY math and the AI you already use.

Fault finding

Track a fault to its cause.

Pick a symptom and get the likely causes ranked for your generation — IMS and bore scoring on a 987.1, AOS and coolant pipes on a 981 — with the checks to run and the parts to order.

Ranked by likelihood for your exact generation
The checks to run first, in order
Part numbers ready to order
Explore fault finding
flat-six / fault finding
Symptom
Sweet coolant smell after a drive
Likely causes
01
Centre coolant pipe (plastic)
Part 981.106.665
HIGH
02
Water-pump weep hole
Part 9A1.106.011
MED
03
Expansion-tank cap seal
Part 999.673.323
LOW
Service history

Log every job, keep the record.

Record each service with a checklist, mileage and cost — DIY or shop. Your full history stays with the car.

Annual oil serviceDIY
41,980 mi · Mobil 1 0W-40 · $182
Sep 2025
Brake fluid flushDIY
39,120 mi · ATE Type 200 · $58
Mar 2025
Plugs & air filterDIY
35,400 mi · 6× NGK @30 Nm · $236
Aug 2024
Service history
Service plans

Plan what's coming up.

Build plans with the steps and parts to order, tick things off, then turn a plan into a logged service in one click.

Brake fluid flushPlanned
Due ~Apr 2026 · 44,000 mi
Order ATE Type 200 (1 L)
Top reservoir, bleed RR → LF
Confirm firm pedal, log it
Service plans
flat-six / tools · will it fit?
FITS265/40R19 on 9.5Jrear axle
Tyre ↔ rim
Ideal — 265 on 9.5J
Diameter
−4 mm (−0.6%) vs OEM
Speedo
reads high 0.6%
Clearance
+6 mm poke
DIY tools

Will it fit? Do the math.

Save the wheels you own and check any tyre against them — rim fit, rolling diameter, speedo error, poke and clearance — plus offset, staggered-diameter and alignment calculators with visual diagrams. Our own math, no third-party site.

Open the DIY tools
Multi-car garage

Run more than one car.

Add every Boxster and Cayman you own — 987 or 981 — and switch in one click. History, plans and AI context stay scoped to the car you're looking at.

See the garage
987Active
Boxster Spyder
2011 · 42,500 mi
981
Cayman S
2014 · 38,120 mi
+
AI assistant

Manage it all just by chatting.

Connect your garage to Claude, OpenAI, or Gemini over MCP and simply talk to it. It logs services, looks up specs, answers fault questions and plans what's next — updating your garage with your approval.

ClaudeOpenAIGemini
How the assistant works
Just did an oil change at 42,180 miles — Mobil 1 0W-40, new Mahle filter and crush washer. Log it?
Done ✓ Added Annual oil service to your history.
Annual oil serviceDIY
42,180 mi · Mobil 1 0W-40 (7.5 L) · Mahle OX 366D
Want me to set the next one due in 12 months / 10,000 mi?
Yes please. And what's the drain plug torque?
Set ✓ Next oil service ~52,180 mi. Drain plug is 50 Nm with a new aluminium crush washer each time.
200
fault codes indexed
2
generations supported
Multi
vehicles per garage
DIY
wheel & alignment tools
Open source

A free project, built by an enthusiast.

FLAT·SIX is free and open source — no ads, no tracking, no paywall on the reference data. Built by a 981 owner who wanted to give the DIY community the tool he wished existed.

Read the story View on GitHub
$0
free, forever
Open
source on GitHub
No ads
no tracking, no catch
You
ideas & PRs welcome

Know your car inside out.

It's free. Add one car or several, track faults and services, and connect the AI you already use — more models are on the way.

Start your garage