Buttons limit lateral movement of the camshaft in engines without cam thrust plates. Needle bearing buttons reduce friction for "free" horsepower. Machining of the cam sprocket may be required.Small Block Chevy Aluminum Cam Button, Early w/Flat Timing Cover Availability: Usually ships the next business day 90050$4.99 Don't see what you want? .......... Need help? Or, IF THERE IS NO ORDER BUTTON AVAILABLE on the part you want to buy, please call us TOLL FREE at 1-888-6 GO FAST(1-888-646-3278) Monday - Friday 8AM - 4:30PM Pacific Time and talk to one of our experienced Sales Agents. Some parts may not be legal for sale or use in California and other states on any polution controlled motor vehicles. Check your local laws for use. Copyright © GoFastParts.com all rights reserved. No part of this site may be reproduced without prior written consent.