The right sound. The right power.
Custom exhaust systems, precise repairs and ECU remapping, fitted by our team in London. Your car, running smoother, sounding better and performing at its peak.
Exhaust services.
Whether you want a better note, more flow or simply need a repair, we fit and fabricate to suit your car.
Back box
Replacement or delete, from a refined upgrade to a louder, more aggressive tone.
Middle box and resonator
Replacement or delete, to change the character of the sound and open up flow.
Tailpipe installation
New tailpipes fitted to finish the rear of the car and shape the exhaust note.
D-cat
Ask us about options for your car and what is suitable for road use.
Downpipe fitting
Performance downpipes fitted properly, often paired with a Stage 2 remap.
X-pipes and straight pipes
Custom pipework for a free-flowing system with a distinctive sound.
ECU remapping.
Optimise your engine's power, improve fuel efficiency and sharpen throttle response. Choose a stage to see what it involves.
Gains vary by car and engine. We'll tell you what to expect for yours.
Why Polimax.
Exhaust and remap work only feels right when the whole car is considered.
The sound you want
Tell us the note you are after, refined or raucous, and we'll recommend a setup to suit your car.
Properly fitted
Clean fabrication and secure fitting, so the system sits right and stays quiet where it should.
Power with purpose
Remaps matched to your car and any hardware fitted, for useful, usable performance.
Quality components
Stainless steel systems from brands we trust, chosen to last.
Repairs too
Leaks, damaged boxes or worn pipework. We repair as well as upgrade.
Two London studios
Bethnal Green and Wimbledon, with the same standard at both.
How it works.
Enquire
Tell us your car and what you want: a new sound, more power or a repair.
Advise
We recommend the right parts or remap stage for your car and goals.
Fit or remap
Work carried out by our team at Bethnal Green or Wimbledon.
Handover
Final check with you, so you know exactly what has been done.
Get your quote.
Tell us about your car and what you have in mind. Sending the form opens WhatsApp with your details ready to send.
Saturday 09:00 to 16:00
Exhaust and remap questions.
What is the difference between Stage 1 and Stage 2?
Stage 1 is a remap for a car in standard or near-standard condition. Stage 2 is tuned to suit supporting hardware, such as a downpipe or a free-flowing exhaust. We'll recommend the right stage once we know your car.
Can you repair my exhaust as well as upgrade it?
Yes. We fit and replace back boxes, middle boxes, resonators and tailpipes, and carry out repairs.
Will the exhaust be too loud?
That depends on the parts and what you choose. Tell us the sound you want and we'll talk through the options, from refined to aggressive.
Are these changes road legal?
UK rules apply to exhaust noise and emissions equipment. Tell us what you are considering and we'll advise on what is suitable for road use on your car.
Will a remap affect my warranty or insurance?
Modifications can affect a manufacturer warranty, and you should tell your insurer about any changes. We're happy to explain what is involved before you book.
Can I have an exhaust fitted and a remap together?
Yes, and it often makes sense. A Stage 2 remap is designed around supporting hardware, so many customers book both at once.