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I spent the last 2 days going through every thread I could find on cats and exhausts and am now completely confused. Looking on line I see that there are some Y pipes made that are replacements for the originals but no mention is made of Hi-Flow 3 way OBDII compliance, seems like you cannot have your cake and eat it.

If I was to go crazy and buy a Bassani Y with cat 58150B3 for $400 could I make it compliant by putting a bung after the cat and does the same go for a custom made Y using a Flowmaster Scavanger Y250300 and either a Magnaflow 94309 or a Catco 2906 cat.

To save money I'm thinking of cutting my existing Y pipe just befoe it 90s into the 1st cat and putting my own 90s on that would go into the Flowmaster Y and then into a Hi-flow 3 way cat with a bung behind it. Will this get me through NY State Emissions?

Does anyone have the correct part #s for Hi-flow cats that will fit a 96 Bronco.
 

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