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I just read some reviews on the Total Seal rings and some people have had problems with them, while others love them. I don't think they're worth the risk. And they're not cheap either. $126 from Jegs. I got my NPR rings on eBay for $22.
I probably won't be using the XFI ECU. I'd have to basically convert the whole 1994 Metro to a 1991 and I think I'd lose the ability to use my Suzuki scan tool with the older ECU. What does the XFI ECU do differently anyway?
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