
About
Pleiades Performance have a passion for all things Subaru, especially when it involves making more power!
We have been mapping and datalogging Subarus of various specifications in South Wales for 4+ years, are well acquainted with both the EJ20 and EJ25 engines, know what works well, and what the limits are for these engines.
We provide remapping, datalogging, parts sales, and engine builds for most makes and models of Subaru, so feel free to get in touch using the form below or via our social channels (search Pleiades performance on Facebook and Instagram), via email at pleiadesperformance@gmail.com, or by WhatsApp on 07878074666
Remapping
Remapping modifies the data within the car's Electronic Control Unit (ECU), which can enable the engine to develop more power . Remapping can be undertaken on the road or on a dyno (rolling road).
We can remap standard Subaru ECUS and aftermarket ECUs, and are most experienced with the G4X ECU from Link.
We generally suggest using the standard Subaru ECU for minor alterations to the car (e.g. slightly bigger turbos and injectors), and then going over to an aftermarket ECUs when major modifications have been made (see the picture below of a hillclimb car that we have been heavily involved in developing, which is now making 470whp using a Link G4X ECU).

Datalogging allows the monitoring of engine health, including parameters such as air/fuel ratio, boost pressure, ignition timing, knock count, injector duty cycle, wastegate duty cycle, and many more! This is an ideal activity to undertake if you are thinking of buying or selling a Subaru, or want to check the health of your engine.

Get a Quote
Please get in contact via the form below or via WhatsApp on 07878074666 if you would like any additional information regarding any remapping or datalogging:
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Datalogging is £50 per session
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Standard ECU reflashing is £175 per session
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CarBerry ROM conversions (allows launch control, antilag and mafless on the standard ECUs) is £300 per session
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Aftermarket ECU (Link G4X etc.) setup and remapping is £350 per session
Recommended Supplier list:
Machining:
- Roland Alsop
- Swansea Auto
Subaru OEM Parts:
- DL Motorsport
Subaru Performance Parts:
- Killer B Motorsport
- Process West
- IAG
- Perrin
- Fuji Racing
Turbochargers and Accessories:
- AET Turbos (Xona Rotor)
- Turbosmart
Suspension and suspension parts:
- Nitron
- Tein
- Whiteline
- Superpro
ECUs:
- Link
Radiators and Intercoolers:
- Bridgend Rads
- Valley Radiators
Oil and Coolant lines:
- Racinglines
Gauges:
- Prosport
Brake Discs, Pads, and Lines:
- Godspeed Brakes
- Goodrich
Exhausts:
- Invidia
- ProFab Exhausts
Wideband Kits:
- Innovate Motorsports
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Pleiades Performance is not affiliated in any way to the above companies - we have had good experience using these parts and/or good customer experience when interacting with the companies.

