AHC Guides & Advice
Fitment checks, product comparisons and fitting advice to help you choose your next upgrade. Start with a topic below or browse all our articles.
Door projectors
Sizes, compatibility and replacement advice.
Daytime running lights
Choose the right boards or modules for your headlights.
Dynamic indicators
Understand the upgrade and what fitting involves.
Steering wheels
Materials, displays and custom wheel choices.
Paddles, badges & finishing touches
Explore the details that personalise your car.
Materials & care
Learn about carbon fibre and caring for your interior.
Still unsure which part fits? Get fitment and fitting help. Planning a bespoke wheel? Request a custom wheel quote.
All articles
BMW Door Projector Size Guide: 50mm or 70mm? | AHC
Choose the correct BMW HD LED door projectors with our Short 50mm and Long 70mm fitment guide, chassis examples and tips for checking your existing lights.
Read moreabout BMW Door Projector Size Guide: 50mm or 70mm? | AHC