Innovate Motorsports 3764 Extended 1 inch Exhaust Bung and Plug Kit (Mild Steel)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Standard size used in all O2 sensors</li><li>Mild-Steel Bung and Plug</li><li>1 inch tall， thread 18mm x 125</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31uqhc7ZLIL.jpg" noproxy>