III+ engine, you will also need to have O2 (oxygen) sensor bungs - typically one per bank - welded into the down pipes below the headers. California installations will need to utilize a manifold / header that is CARB certified.While the XJ has a relatively narrow window in which to run...
III+ engine, you will also need to have O2 (oxygen) sensor bungs - typically one per bank - welded into the down pipes below the headers. California installations will need to utilize a manifold / header that is CARB certified.While the XJ has a relatively narrow window in which to run...