I needed a commuter car something fierce for my 75 mile round trip commute and $4.39/g gas prices. I found this '89 Mid-engine Run-about 2-seater (MR2). Afterwards, I learned that Yamaha designed the head to make these little 1600cc motors have more performance. It's a pretty cool setup where each cylinder has to separate ports that lead to the two intake valves. One has a butterfly valve on it that stays closed until 4200 RPM. It keeps the velocity up on the lower end and allows more airflow when needed on the topend. It makes for a much funner commute and I'm getting 35 mpg in mixed city/hwy.


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