The Ultimate Digital Toolkit for Modified Owners

We knew we owed our modified car owners tools that matched the effort they put into their builds - and today, we’ve found our next gear.

Your feedback has driven our development straight out of Beta, and Modifications is now officially live.

Whether you’ve been tinkering in the garage or planning a major performance overhaul, you can now turn those upgrades into a professional digital record. Finally, a clear view of the performance gained from the new turbo, a remap, or chucking the back seats.

What's New:

Modifications lets you track, organise, and showcase every upgrade — performance or aesthetic — all powered by the Custodian history file.

• Automated Base Stats: To give your modifications context, we now automatically populate factory specifications for your car, including Horsepower, Top Speed, 0-60 mph, Torque, Weight, and Redline. (make sure you've got the correct model!)
• Build Logs: Create a dedicated History File entry for every mod and keep track of your build over time. Categorise every modification as either Performance or Aesthetic, and the history file will make them look their best.
• 500+ Parts Manufacturers:  We’ve integrated a database of over 500 providers and suppliers, making it easy to detail components on your car with a few clicks.

Why Document Your Build?

For the builders, the tinkerers, and the owners whose cars will never be finished.

• Be Proud: Every choice, from a custom ECU tune to a titanium exhaust, is part of your car’s unique story. Share it!
• Increase Value: Well-documented builds with quality parts and professional installers add tangible value and trust for future owners (should they be so lucky!).
• Performance Tracking: Track your mods alongside your base stats to see the real-world growth of your vehicle’s power band.
• Support Insurance Claims & Valuations: Professional installation records and detailed part info can make all the difference when getting insurance and god forbid, making a claim!
• Professional PDF Exports: Your modification history is automatically included in your car's very own PDF Brochure.

How to Get Started:

You’ll now find a Modifications tab on your car’s profile.

From here, you can add modification entries (special history file entries) — but with extra modification-specific detail depending on whether it's a performance or aesthetic mod:

• Part manufacturers (we've added 500+ already!)
• Installation type (self or professional)
• Costs & documentation
• Impact on stock stats (e.g. +50 bhp, –20 kg)

Every entry builds a clear, evolving story of your car — built, not bought, but organised!

Documenting your modifications also gives you an advantage.

With Custodian Insurance, you can declare all modifications with nothing to hide. By providing a clear digital record, we can often help enthusiasts secure accurate coverage at competitive rates and fairer premiums.

Should the worst happen, having your parts, costs, and installers already backed up in your history file makes the valuation process significantly smoother. If you have an insurance renewal in the next 30 days, we would love to see what we can do for you.

As always, thank you for choosing Custodian! We’re still a small team and growing fast, so if you spot anything that needs a tweak or a tune, please let us know.