I was getting some stink from one of my cats and it no longer smells but I can feel the exhaust rumble a little at wot and am wondering if one cat pooped the bed? If so, are magnaflow cats worth the coin?
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How many miles on the car, Cats have an 8/80,000 warranty since they are emissions.
Also if the car is under emissions warranty after market cats are against federal law and by law if the vehicle is sold you and the shop that put them on is liable for replacing them and paying the rather large fines
Is your check engine light on? Downstream o2 sensor should throw a code if the cat is bad. I seriously doubt it is bad at any rate they last a long time.
On my 90 GT when my cats went bad they rattled really loud at an idle, even had a bit of the honey comb material sticking out of the left exhaust pipe! I replaced them with Catco units and didn’t have a problem passing DEQ in Oregon. I was running a Kenny Bell 1.6 L blower, E303 cam, aftermarket heads etc. Of course I’m not sure yours would pass the emissions test or the visual, but in my case I didn’t have a problem.
I'm going to open a can of worms here, but this is an absolute fact.
There is no such thing as a high flow cat.
Any cat that will pass a smog inspection will flow no more than a stock cat.
And there it is, the cold hard truth.
I have heard that so called "high flow cats" do have less restrictive air flow and are worth it on any performance based exhaust system. Have I seen any data or proof of these claims? no
Same here. I was just thinking if my cats do crap out might as well try the magnaflows. That and Borla I actually trust.
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