Stealth black compact 25mm twin piston atmospheric dump valve with adjustable spring preload. Direct replacement for factory standard 25mm fitment plastic valves that are notorious for failing on modern turbocharged cars. Twin piston valves are more suited to modern management systems as the twin piston design keeps the inlet closed at idle.
    
   
Twin piston operation
   
Atmospheric
   
Stealth black finish
   
Fully adjustable
   
Inlet size 25mm
   
25mm blanking plug included