Bonalume Switchable Power Pop Off spacer made from anodised billet alloy.

Allows the engine to vent the unwanted boost into atmosphere for the blow off / dumb valve noise or recirculated into the the intake silently at the flick of a switch.

Faster boost recovery between gear changes and improves throttle response.

THE ALL NEW PPMF EXTERNAL EXHAUST SYSTEM ON ORIGINAL MULTIAIR ENGINED VALVE FOR ABARTH – ALFA – FIAT – LANCIA

New product created specifically for those who just want to hear the classic puff of boost releasing or stealth mode.