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Message: <blockquote data-quote="h701micra" data-source="post: 644371" data-attributes="member: 10465">CB20 is the Sunny Gti-R engine (according to google)Or the nissan CB20 is a busCams move power up the powerband. So lower down suffers. If your using this as a daily don't go for mad profiles or it will run lumpy as has been saidWith a cam upgrade a good spring upgrade is recommended <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite13" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />Demon tweeks don't do cam grinding so I think you'd receive a blank one. If in doubt give em a ringIirc all pulleys are the same just varies with accessories a/c, pas etc</blockquote>