J-Spec Performance SA

J‑SPEC Performance SA is a Swiss performance workshop specialising in mechanical and electronic tuning for road and competition cars. They offer engine and transmission builds, dyno tuning, suspension setup and motorsport wiring alongside parts distribution.

The company is an official distributor for multiple Japanese and US brands and maintains on‑site workshop facilities in Quartino for race preparation, corner weighting and chassis setup. Contact details and opening hours are published on their site for appointments and parts enquiries.

A hands‑on performance workshop serving enthusiasts and race teams.

Look out for:

• Full engine and transmission builds and race prep services.

• 4‑wheel dynamometer tuning and chassis/suspension setup.

• Motorsports wiring harnesses, corner weighting and wheel alignment.

• On‑site stock of aftermarket parts and official distribution for several Japanese/US brands.

Best way to experience it:

Bring clear details about your car and goals (power targets, track use or road setup). Call or email ahead to confirm technician availability and parts stock; longer builds and dyno sessions are scheduled by appointment.

• Shop hours are listed on the official site (Tue–Sat; confirm before visiting).

• Phone and email are published for enquiries: +41 91 791 91 17 / info@j-specperf.ch.

• Appointments are recommended for dyno time, engine builds and major work.

• They act as an official distributor and can often source parts quickly, but confirm availability for specific items.