Tuned by Ryan – Focus ST/Rs & 15-17 Mustang “Ignition Cut Rev Limiter” Tune

Tuned by Ryan – Ignition Cut Rev Limiter Tune for

Focus ST/Rs & 15-17 Mustang

Off-Road Use Only: Designed for off-road applications to enhance the auditory experience.

This adds a hard ignition cut at the rev limit, producing the aggressive popping and crackle sound enthusiasts love.

Key details include:

• For Off-Road Use Only: Designed for off-road and track applications to enhance the auditory and performance experience. Will destroy catalytic converters.
• Customization: Tailored specifically to your Fiesta ST’s setup for optimal sound and rev limit behavior.
• Rev Limiter Behavior: The ignition cut is active at the rev limit and produces an aggressive popping and crackle sound. Abusive on exhaust components — ensure all exhaust connections are secure before use.

Please note: The ignition cut rev limiter is abusive on exhaust components and can blow out mufflers or exhaust tips if they are not properly secured. This configuration will also destroy catalytic converters. This tune is intended for off-road or track use only.