Hi Guys;I m changing my cat and installing a new Hooker catback exhaust in my 87 GN.Its necessary to install a gasket between the flange of the cat and the flange of the exhaust? If so any part number of GM original or aftermarket?Thanks
Hi Guys;I m changing my cat and installing a new Hooker catback exhaust in my 87 GN.Its necessary to install a gasket between the flange of the cat and the flange of the exhaust? If so any part number of GM original or aftermarket?Thanks