Fidanza Ford / Mazda 2.5L Flywheel Air Filters>Air Filters - Direct Fit Many tuners witnessed this early

Many tuners witnessed this early on after doing multiple dyno pulls and seeing significant drops in power after each consecutive pass

and a more refined exhaust note

These simple devices plug right into the factory harness in place of the exhaust valves and prevent any code from ever being stored in the ECU due to the removal of the exhaust valves

And if you want to switch it up to add tips later

more comfortable interior with improved acoustics

Fidanza Ford / Mazda 2.5L Flywheel Air Filters>Air Filters - Direct Fit Many tuners witnessed this earlyWhen selecting replacement friction kit, confirm bolt pattern (18 vs 20) for your specific flywheel before purchase.