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Specifications2.4 liter 420a engine informationFocusing on Piston information right nowBore: 3.444 Oversize: 3.464 Stroke 3.98 Rod Lgth: 5.954 C/H: 1.117 Head CC: N/A Comp Ratio: 9.5:1 Dish/Dome Vol.: +2.26 Allpar.com has a fairly detailed description of the 2.4L 420A powerplant here.
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