BUZZ-Westport Innovations Inc: Q4 revenue falls nearly 48 pct
** Canadian auto parts maker's U.S.-listed shares down 10.2 pct at $5.10 after market
** Reports Q4 consolidated revenue of $27.4 mln, down 48 pct from a year earlier
** Says revenue fell mainly due to discontinuation of its first-generation Westport HPDI system and competition from gasoline-fueled vehicles due to fall in petroleum-based fuel pricing
** Says revenue also hurt by impact of foreign currency exchange
** Up to Monday's close, stock had fallen 67.5 pct in the past 12 months
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