8th Generation Honda Civic Forum - View Single Post - DIY ** NST Civic SI underdrive pulleys
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Old 04-16-2007, 06:11 PM   #67 (permalink)
rmfa
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Ronnie
Quote:
Originally Posted by freekaingjon
how come the pully looks smaller than the stock ones? wouldnt that cause a problem with the belt?
The pulley being smaller is exactly the point of the under drive. It 'under' drives it to use less power from the engine.
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