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OE 4.4: ~$1400, Aftermarket: ~$400 (archive)
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Posted by M5 LITE on October 01, 2001 at 13:22:14:

In Reply to: Roughly how much to replace Cat Converter ? Thanks posted by HigHBeemZ on September 30, 2001 at 15:28:25:

Factory stuff is good for noise control - slightly restrictive though.

Aftermarket (Car Sound #94306 made by Random Technology) cats are about $120/cat and install should be around $100 to cut out old ones and weld in new ones. These cats are slightly louder than the OE ones but flow better.

I have the Car Sound cats - they are sweet. You can see through the cats becasue the substrate is very dense but has a straight through design. Engine revs completely freely - even with the stock resonator and muffler in place.

Gene
M5 LITE

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