This rev limiter is designed exclusively for the MSD 6T, 6TN and 6-HVC Ignition Controls. It has a special 4-wire connector that plugs into the MSD Ignition. The Soft Touch is a very smooth rev limiting action that "holds" the engine at the selected rpm limit without backfires, extreme roughness or engine damage. The rpm limit is adjusted with plug-in modules and 6,000, 7,000 and 8,000 modules are supplied. NOTE: Must only be used with an MSD 6T , 6TN or MSD 6 HVC Ignition and is adjustable for 4, 6 and 8-cylinder operation. 8738$86.99 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.