Quote:
Originally Posted by cRiPpLe_rOoStEr
BTW when my dad had a Subaru I've already considered to replace its flat-4 with a Harley-Davidson Twin-Cam.
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Subaru would make an ideal conversion as you could run it as an opposed piston twin. This would result in perfect primary and secondary balance and hence this conversion would be considerably smoother than a straight 4 conversion.