ISR Performance GT Series Turbo Oil Drain Flange
ISR Performance GT Oil Drain Flange w/ Integrated 5/8 male neck (fits GT15-GT38 BB Turbos)
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Posted by Mike Clarke on 3rd Sep 2014
This is the best adaptor to use imo when running a GT-style turbo. upgrading GT style turbos just swap this return over to the upgraded turbo and be done.