sneakingfart
OBS Enthusiast
I'm in Long Island.Where in NY are you? I have the stock cats I took off my 99 Yukon.
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I'm in Long Island.Where in NY are you? I have the stock cats I took off my 99 Yukon.
Thank you, I haven't thought about going that route.IMO no benefit to the high flow on a stock application.
A while back one of the stock cats went bad on my '06 SS, rattling like crazy and finally blew into chunks so the exhaust sounded really dumb with one cat and one blown. Local performance exhaust shop welded in a universal fit Magnaflow for about $150. Can't beat that when the "direct fit" stuff is almost $800.
Richard
Yea, same problem here. Good thing Is, my parents live in a free state and they are coming to visit soon. They can drive it up for me.New York State passed a law within the last year that any replacement cats has to either be OEM or have a CARB EO number. I live in New York also and Summit won't even ship a universal federal emissions cat to my house.
It's the same on Long Island, problem is nobody will ship here. I have a way to get it, but I have no desire to make a non-CARB vehicle CARB compliant.Must live in a populated area. They don't give 2 ***** where I am. Long as check on light isn't on, it's good.
That's something I have to look into. I can tell you that going from a stock 2" pipe to the high flow 3" on my Civic Type R made a huge difference in turbo spool and pressure.If the high flow version comes with a 2.5" head pipe and the non-high flow has the weak @$s 1 7/8" head pipe then yes, it's worth it even on a bone stock application. Is there a difference in head pipe sizes here?
Far as I know, there's two kinds of catalytic converters.
GM's original "pellet" style. Theoretically rebuildable--GM had a process for dumping out all the "old" pellets, and replacing them with "new" pellets, on-the-vehicle. In real life, the screen that held the pellets in would rupture, and then all the pellets would wind up in the muffler. Used to be somewhat common to see cars idling at the stoplights, spitting a pellet out every now and then from the end of the tailpipe. The mufflers would rattle like maracas when you'd smack 'em with your fist.
Ford, and everyone else's monolithic "honeycomb" style. Non-rebuildable.
The monolithic, honeycomb style flows better than the pellet style. A "high-flow" catalyst is one that has the honeycomb structure instead of the pellet structure, and maybe has less catalyst material inside than OEM. So pretty-much every aftermarket catalyst could be advertised as "high flow" especially if it's replacing an OEM pellet-style.