Adjustable Pop-Off Spacer – Bonalume – Punto Evo Abarth

New power-pop for multi-air engines Easy to install (10 minutes) (DUMP VALVE,POP OFF VENTIL,BY PASS,)

It does not require any electrical or pneumatic connection

No contraindications or interference with engine performance.

Excellent sound with the possibility of regulating the intensity, which can be activated and deactivated with the simple rotation of a cursor