What is gti-r injector top hat diameter 11-14mm ?


New Member
Hi ! Can anyone answer fast whats the diameter on gti-r injectors on top hat mounting in fuel rail ?
I whant upgrade injectors and some aftermarket inectors are 14mm top hats !


standard injectors are just short of 10.9mm rc's go straight if you use the injector dynamics 11mm top hat youll have to bore your rail out


Active Member
I got an injector service kit off eBay and the tophats were too small for my blitz/Denso injectors. I got some that fit from a specialist called af tuning in chesterfield.