Vibrant SS Turbo FLEX Coupling with Interlock Liner 2.25in inlet/outlet x 4in long 120 it comes with a 52mm

it comes with a 52mm threaded nut and an optional bracket kit

Each full assembly includes two (2) V-Band Flanges and one (1) V-Band Clamp

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Vibrant SS Turbo FLEX Coupling with Interlock Liner 2.25in inlet/outlet x 4in long 120 it comes with a 52mmVibrant Performance TurboFlex Couplings feature an internal Stainless Steel Interlock Liner to facilitate smooth flow and also protects the bellows from direct exposure to high temperature exhaust gases. Recommended for all high flowing, high temperature applications (e. g. forced induction).