Effective CEL Solution: This O2 CEL fix is engineered to help you bypass the annoying check engine light, ensuring a smoother driving experience. This essential component features a built-in miniature catalytic converter designed to effectively eliminate the CEL (Check Engine Light) that often appears after exhaust modifications, removal of the catalytic converter, or even when installing a high-flow catalytic converter.
eBay
STAINLESS STEEL WELD-ON EXHAUST LAMBDA NUT M18 X 1.5MM. Size : M18 x 1.5. Stainless Steel 304. Length : 12.7mm / 13mm. Car Make : Universal.
eBay
The use of an A/F sensor and gauge is an indispensable tool for engine tuning. To acquire the A/F reading, an O2 sensor needs to be installed on the exhaust manifold or the front pipe, along with installation of A/F gauge.
eBay