Boosters are available in 7" or 8" diameters and fit the Allstar Brake Pedals as well as other aftermarket units. For use with Allstar ALL41010 and ALL 41011 Master Cylinders. The 7" Booster is 3-5/8" Deep, the 8" Booster is 4-1/4" deep.Power Brake Booster 7" Availability: Usually ships the next business day. 41007$124.99 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.