nosc Hello, I was wondering can you do the pre cat on a vectra c 2.2 16v (z22se). Whitout any problem? If its that easy to drill it out clear the hole, ill would give it a try. Thank Henk
si_c1978 no it will be below the join between the exhaust manifold and downpipe before the flexi section if you take it off it'll all make sense. :thumbup: