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Old 05-03-2019, 04:30 PM   #247 (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: 58.53 mpg (US)
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That's my guess. It's the stock K24A2 header. I'd have preferred a K24Z with integrated header but this block was much cheaper, is more tunable (has VTEC on both intake and exhaust cams), and is capable of more power.

Integrated header allows leaner operation and faster warmup
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