Tampa 928s

The two metal test ports with the rubber caps on the back of the motor attached to the intake manafold; I believe they went to the cats. With the X-pipe, cats removed are they still necssary?

sharkmeister85

Actually they connect to the exhaust manifolds. I don't think mine were ever used so I just removed them and plugged the exhaust bungs.
Glenn

Schocki

They are for CO testing before the cats, if you don't need them, plug 'em.

Big Dave

Mine were both rusted and leaking. I removed them and plugged the holes on the exhaust manifold with locally purchased bolts. JB weld sealed them in place.

fabric

Or you can just get a BB from Ace that fits inside the stock fastener and seal it up with that.

davek9

I need to plug these on my new X pipe, does anyone know the correct size "bolt" or what to use please?

Thanks,

Dave

Fabio421

It isn't a bolt thread. Using a bolt isn't the proper way to seal them. There are plugs available to seal them. You can match it up at a specialty hydraulics house if they carry alot of metric fittings. Roger also sells them.