KMS Thunderstorm Deres Exhaust with Decat – Mk2 Focus RS

KMS Thunderstorm Deres Exhaust with Decat – Mk2 Focus RS

Unleash uncompromising performance with the KMS Thunderstorm Deres Exhaust System, complete with a decat and slip‑joint connection. Designed for the Mk2 Focus RS, this system delivers raw power, aggressive tone, and track‑ready efficiency — a true upgrade for drivers who demand more than factory limits.

The slip‑joint design ensures a secure fit while maintaining flexibility, making installation straightforward without the need for flanges. Paired with the decat, the Thunderstorm system maximises exhaust flow, reduces back pressure, and sharpens throttle response, giving your RS the visceral edge it deserves.