I replaced the cat on my Grand Wagoneer for a $100, but I don't think it's stainless steel. i dealt with Germanstar a lot and they are very good. Try Thebenzbin.com, too. Anything over $50 is shipped for free (5-day UPS)

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1985 190D 2.2l Sold-to Brother-in-law
1996 Mustang 3.8l -"thinks it's a sports car"
1988 Grand Wagoneer - Sold (good home)
1995 Grand Cherokee Ltd -"What was I thinking??!!"