Advice for Cats

gbowles at gbowles at
Sun Nov 20 15:08:21 PST 2011

I'm asking for a friend. He has a 2004 S4 4.2l with 4 cats (as I understand what he said). He is in the process of having the exhaust modified to achieve a sound more in keeping with the beast under the hood. Someone has recommended removing the 2 rear-most cats to get that. This is in addition to replacing the system from the cats back. His question: Is the car likely to pass emission testing if that is done. If so, is it legal. (Passing the test is the bottom line after all.) Any BTDT and/or recommendations appreciated. Thanks.

Mr. Greville H. Bowles
Ralston CanSafe
525 Glengarry Cres.
Fergus, Ontario  N1M 2W8
Phone: (519) 787-1297  Ext. 39
Fax:   1-800-669-2392
E-mail:   gbowles at

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