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Old 12-20-2018, 07:15 AM   #85 (permalink)
Ecky
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Join Date: Dec 2011
Location: New Zealand
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ND Miata - '15 Mazda MX-5 Special Package
90 day: 39.72 mpg (US)

Oxygen Blue - '00 Honda Insight
90 day: 59.95 mpg (US)
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If that cat is clogged it could hurt mileage, but most likely it isn't. A catalyst can be a few percent degraded without being dirty or crudding up.

Those look like the same clips and sadly I'm not aware of any stronger ones.
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