Modifications & Customisation

Accentuate Your Style. Unleash the Performance

At A & S Cars, we believe your vehicle should reflect your personality — not just in style, but in how it drives. That’s why we offer a comprehensive modification service that goes beyond just visual customisation. Whether you want to turn heads or turn up the power, we help make your car truly one of a kind.

We don’t just sell standout cars — we help build them.

Why Choose A & S for Customisation & Performance?

Curated Stock of Modified Vehicles

Our showroom features a unique selection of vehicles that already come with high-spec modifications — including rare body kits, upgraded wheels, carbon trims, exclusive interior details, custom exhausts, and mapped ECUs.

You’ll find specs and styles here that most dealers can’t offer.

✨ Bespoke Styling & Upgrades

Looking to personalise your car even further? We can arrange high-end custom work to match your vision. From alloys, wraps, body kits, and splitters to ambient lighting, infotainment systems, or interior retrims — we work with top specialists to deliver premium finishes that elevate your vehicle’s presence.

Performance Modifications & ECU Remapping

We now offer engine tuning and mechanical upgrades, including:

Stage 1, 2, or 3 ECU remaps
Gearbox TCU remapping for quicker shifts
Dyno-proven custom calibrations
Upgraded intakes, downpipes, and exhausts
Pops & bangs, overrun, and crackle maps (on request)
Cooling & fuelling upgrades for high-power builds

Whether you're chasing maximum output, better driveability, or just more fun, we can help you unleash your vehicle’s full potential safely and reliably.

Personalised Consultation

Not sure what works best for your car? That’s where we come in. Our experienced team will guide you through the most effective visual and performance upgrades for your make and model, all tailored to your taste and budget.
We give you honest, expert advice backed by 25+ years in the industry.

Network of Trusted Specialists

We’ve built strong relationships with some of the best names in the business — from tuners and fabricators to detailers and paint protection experts. Our partners are highly rated and battle-tested.
So whether you're going subtle or full-on showpiece, your car is in safe hands.

Our Process:

Consultation –

Talk to us about your ideas, and we’ll provide tailored recommendations.

Plan & Build –

We’ll create a custom modification or tuning package for your car, and book you in with the right people.

Delivery –

Your vehicle is returned fully upgraded, fully inspected, and ready to enjoy.

Browse Our Custom Selection

We stock rare, tastefully modified vehicles that come pre-equipped with unique custom features. Browse our current selection to find the car that already reflects the distinct style you’re looking for and feel free to reach out if you have any further questions.

Lets's Talk About Your Build

Whether you want to enhance the look, feel, or power of your vehicle — or all three — we’re ready to help.

Phone: 07537 165344

Email: [email protected]

Social Media: @a.s.cars.uk

Visit Us: Visit our showroom in Bishops Stortford for a personal consultation on customising your vehicle.

Accentuate your success with a vehicle that truly represents you.

Make an Enquiry