Enhancing Vehicle Performance for Over 25 Years

Specialist tuning, mechanical and engineering services for daily drivers, classics and modern vehicles alike.

Whether you drive a car or van, petrol or diesel, daily commuter or classic show-piece, we’re here to maximise your drive. From ECU remapping to full performance tuning, we deliver expert solutions for every make and model.

Our Services

Based in Chorley, Lancashire, we offer a convenient and friendly service backed by real industry credibility.

We provide tailored ECU remapping for all makes and models, developed in-house and fully tested. As a proud member of the Independent Garage Association (IGA) and an official Trust My Garage partner, we deliver trusted, high-quality workmanship you can rely on.

Whether you want more power, improved efficiency or a smoother, more enjoyable drive, we’re here to help.

Car and Van Servicing

Regular servicing protects your engine, prevents unexpected breakdowns and keeps your warranty valid. We handle full servicing and record updates while your vehicle remains under warranty.

ECU Remapping

Unlock more power and torque with custom-written ECU software designed specifically for your vehicle. No major hardware upgrades required, just safe, proven performance gains.

Aircooled Engine Case Machining

Restoring an air-cooled engine? We offer precision case machining including full-flow adaption, cylinder boring and lifter sleeve work to prepare your classic engine for reliable performance.

Engine and Crankshaft Balancing

We make sure every rotating component works smoothly together. Dynamic balancing, conrod end-to-end balancing and piston weight-matching all contribute to a more refined, efficient engine.

Ingenium Timing Chain

We diagnose, service and replace timing chains on Jaguar and Land Rover Ingenium engines. All work is completed using OEM-spec components for accuracy, reliability and long-term performance.

Ford Wet Belt Timing

For Ford’s belt-in-oil engines, we carry out full timing kit replacement along with sump cleaning and fresh oil, helping prevent premature wear and protecting your engine from major failure.

James replaced the Timing Chains on my Jaguar XF 2.0d which had the infamous timing chain rattle. From diagnosis to repair, there was great communication throughout. I was sent pictures and even a video of the work carried out and the Jag now runs better than ever!

Adrian McGuigan

Just finished our trouble free summer touring in our 81 T25. Only made possible thanks to the brilliance of James and Kerrie at JS. If there’s anyone better with tuning the aircooled engine, I’ve yet to meet them.

Chris G

The customer service is nothing but the best i highly recommend coming here for any tuning you need doing very friendly his knowledge on cars is unbeatable can fault him at all.

Ollie Bork

Helped me today and was very informative, fixed the issue I had with my car which gave me some relief and was very friendly would highly recommend thanks again.

Paula B

Fantastic service, helped me out with an ongoing issue. Carried out a stage 1 remap while there. The car now drives like a dream. Would highly recommend JSA, most genuine bloke I’ve met, thanks again.

Dom Nolan

Delighted to have found James who has a specialist knowledge of Aircooled VW’s. My Karmann Ghia is now oil leak free and running beautifully, after years of struggling to get the sump oil leaks sorted. Highly recommended.

Bob K