Vibrant Performance 16664 M16 x 1.5 Metric Aluminum Port Plug with Crush...

Vibrant Metric Fitting 16664; Metric Plug Black M16 x 1.5 Male w/washer

Vibrant Performance Multi-Purpose Threaded Plug Universal 29720

Vibrant Performance Multi-Purpose Threaded Plug Universal 16668

Vibrant Performance Multi-Purpose Threaded Plug Universal 16660

Vibrant Performance Multi-Purpose Threaded Plug Universal 16662

Vibrant Performance Multi-Purpose Threaded Plug Universal 16666

Vibrant Performance Multi-Purpose Threaded Plug Universal 16661