JE Performance

JE Performance is a Herlufmagle workshop specialising in ECU/EFI mapping, steady‑state dyno tuning and bespoke motor builds. The team also fabricates wiring looms and offers project consulting for motorsport and performance cars.

Their site and channels document tuned examples (Audi, Nissan, Toyota, Dodge) and show authorised partnerships with Ecumaster, Haltech, FuelTech and others. Contact them directly to confirm appointments and technical scope for your car.

Expect a working tuning garage focused on measurable performance gains via dyno mapping, calibration and mechanical builds. Visits are typically technical and hands‑on rather than touristic.

Look out for:

• Steady‑state dyno runs and mapped tuning sessions documented on site.

• ECU boxes and aftermarket management systems from Ecumaster, Haltech, FuelTech and Link.

• Custom fabrication, wiring harnesses and race‑spec components being assembled.

• Project cars (Supras, Skylines, RS3s, Vipers) used as case examples.

Best way to experience it:

Book a consultation or dyno appointment in advance, bring clear goals for the tune (power, drivability, fuel type) and be prepared for a technical walkthrough of the work and before/after data.

• Appointments are recommended—call or email to confirm availability.

• This is an operational workshop; observe safety rules and PPE if invited into the bay.

• Confirm specific services (dyno, mapping, fabrication) before travelling.

• Address listings vary slightly across directories; use the official site for the best contact details.