If your saying the cam is 570 lift W 110 LSA you do not have a ZZ4, thats closer to the specs of a 306. If so, you aren't going to get it to pass.
Deleting the EGR doesn't cause the car to fail the sniffer, the EGR is closed until the engine is at crusing speed. the reason a car fails emmisions due to the EGR is when it's faulty and not closing all the way. You've eliminated the possibilty.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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