*The O2 CEL fixture has an integrated miniature catalytic converter that helps eliminate this by light inspection of the engine after exhaust changes or removal of the catalytic converter, and sometimes even when a high flux catalytic converter is installed annoying problem. *Shouldn't take a chance just because length doesn't usually play a role, here's an actual integrated tiny catalytic converter. *This O2 CEL curing of small cats will make your ECU think the catalytic converter is still installed. When it removes the catalytic converter the O2 sensor will see a rise in temperature and an increase in the flow of unburned fuel. *For this reason, to see engine light (CEL SES DTC), typical error codes are P0420 (Catalyst for system efficiency below bank 1 threshold) and/or P0430 P0420 (Catalyst for system efficiency below bank 2 threshold), use only for off-road use Auto parts oxygen sensor adapter connector with filter Material: Stainless steel Appearance: true color Size: external thread M18*1.5 internal thread M18*1.5 length 46.5mm Weight: 40g Function: Check Engine Light Repair pack:1piece