JS Auto Tuning & Performance Ltd

Bigger better faster stronger

54a Preston Rd, Chorley, PR6 7HH Directions

   Now closed Open today 09:00 - 18:00

Why Choose Us?

We Are Specialists
Bespoke Service
Family Run Business

Business overview

VW & PORSCHE Aircooled engine specialist. Machining including line boring, full flow, bigger cylinders, dynamic crankshaft balancing, and engine building..

We have over 26 years experience working on Classic Volkswagen and Porsche air-cooled engines, including tuning, servicing, engine building, VW and Porsche air-cooled engine machining services including line boring, thrust cutting, boring for larger pistons and barrels, full flow modifications and dynamic crankshaft balancing services.

Engine building services, stock or performance engines, camshafts dialled in, geometry set, heads ported etc.

We also provide an ECU remapping service for modern vehicles including Add blue disable, DPF Disable, EGR Disable, diesel economy tuning, speed limit and rpm limit removal and more.


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Products & Services

Crankshaft Grinding

Cylinder Head Repairs

Cylinder Heads

Engine Line Boring

Engine Rebuilds

Diesel economy tuning

engine ecu tuning

ecu tuning




Aircooled Specialist

Aircooled engines

Aircooled machining

Dynamic crankshaft balancing

Crankshaft balancing

Conrod balancing

Aircooled Line boring

Porsche Aircooled Line boring

Porsche 4 cylinder engines

Porsche 914 engines

Porsche 912 engines

Twin carb set up

Classic volkswagen speciaist

Classic Porsche specialist

Aircooled engine full flow



  • Light Vehicle Maintenance and Repairs Principles, NVQ Level 3 (Institute of Motor Industry)


Beetle tdi remap

James did an excellent job on my beetle tdi, I got a stage 1 remap and it’s totally transformed my car. It pulls like a train and is also a lot better on fuel now. Someone recommended him to me, I’m recommending him to anyone. He knows his stuff ⭐️ ⭐️⭐️⭐️⭐️⭐️
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Blown up VW engine and they worked magic to get it working.

I highly recommend JS Auto. The guys are genuinely amazing. I had no idea what I needed doing and I’d heard some horror stories about VW engines builders and parts on VW forums , but after a chat with these friendly guys they instantly put my mind at rest with a rough price and plan.( which was bang on ) they were helpful and advised with the whole rebuild and parts I needed and didn’t need. They even tested parts I’d bought else were to make sure they up to the spec I needed. The knowledge they have about VW engines is amazing and they was only a text away with help when needed. Honestly if you need work doing on a VW car or air cooled engine these guys have got what you need. 5⭐️ service
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Vw Transporter T4 work completed “5 Star”

I recommend this garage to everyone who is looking for quality work at a the right price. James carries replaced my Vw T4 timing belt, water pump, tuned the engine/turbo, replaced the 5th gear to increase economy, replaced gearbox oil. All the work was absolutely spot on. 5 star service 👍🏻
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