You can guy the precats yourself....it really isn't hard. Just get a long metal rod or something of the sort, remove the downpipe and just go at it and break them into small pieces. I think there is a company called timevalve or something like that the sells the downpipes.

If you did the rebuild yourself, it would cost probably around $1K. If you had a mechanic do it, he could charge you $2K and up for the job. You might want to look for already rebuild engines on the internet somewhere. Might save youself a bit of money.

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George Carstens