Universal 25mm (1 Inch) Adaptor Flange For HKS SQV SSQV Blow Off Valve.
 
Universal BOV Adapter Flange for HKS SQV SSQV 25mm (1" inch) Dump Blow Off Valve. This lightweight aluminium flange has a rolled end for a more secure fitment.  
 
Features:
Aluminium
Pipe O.D: 25mm
Pipe Height: 45mm
Fits onto HKS SSQV and SSQV II Dump Valves