![Speedflow O2 Sensor Plugs](http://performancewholesale.com.au/cdn/shop/products/806-M__49958.1552266193.486.486_{width}x.jpg?v=1734592572)
Speedflow manufacture these plugs to block off your O2 Sensor ports, they are manufactured in Australia from Steel, Nickel plated and then a spark plug washer is installed to ensure no exhaust leaks will occur!
We have two sizes available, M18 x 1.5 and M14 > 1.5.