Guillerm Performance
Santec, France
Tunes MaxxECU on its own dyno. An official MaxxECU dealer, so you can buy the ECU here too.
At a glance
- Tunes
- MaxxECU✓ Official dealer
- Dyno
- Dyno on site (model not published)
- Address
- 233 route Cleder
Santec
France - Phone
- 02 98 29 82 41
- Website
- garage-guillerm-finistere.fr
Other dyno tuners nearby
- Enginetuner LtdPlymouth, United Kingdom · 181 km · Link ECU
- AUTO DYNAMIXNewton Abbot, United Kingdom · 199 km · ECUMaster, Haltech, Link ECU
- BR TechChateaubriant, France · 233 km · MaxxECU
- Performance Vehicle EngineeringChard, United Kingdom · 252 km · MaxxECU, MoTeC
Still choosing an ECU?
Entry units from the brands Guillerm Performance tunes:
- MaxxECU MINIfrom US$708
- MaxxECU STREETfrom US$968
How this listing was checked
Report a mistake on this page. Listed because there's evidence it tunes aftermarket ECUs and has its own dyno. "Official dealer" means the ECU maker lists the shop on its own dealer finder, so you can buy the ECU here. The brands it tunes also include any it names on its own website. Checked October 2026. Listings are free and shops can't pay for placement.