Quote:
Originally Posted by rabbit640
One mod that comes to mind would be a 2.25 inch piping catback exhaust. I would get better mpg and more power since the motor would be able to exhale at full capacity (emissions standards are non-existent in my city).
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The Z1 engine and o2 sensor do not handle over sized exhaust or exhaust leaks without burning out the $300 o2 sensor within a few months, if you get a new o2 sensor you need to fix the exhaust to stock or you've just wasted money.