Re: po420 and po430
GM had a cheesy catalyst media when they first started using Cats, but the media used now is pretty techno-savvy. Whereas the early ones were filled with a palladium-coated ceramic-type ball-shape, the later ones look like honeycomb and are fairly complex in their design. If you look at each end, you'd think that it is a straight-thru flow, but it isn't. The media isn't heavy, but stick it inside the shell and it gains weight.
Hope it all works out for you.
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Member Nr. 2770
'96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed.
'69 C-10 SWB; 350/TH400 - in limbo
The older I get, the better I was.
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