To make your correct injector choice easier MSD offers an Injector Selector program (PN 2000) that precisely matches the MSD Competition Fuel Injectors' static fuel flow capacity to the maximum airflow demands of a gasoline fueled engine, be it naturally aspirated or turbo/supercharged. You choose 12 different engine parameters to calculate the correct injector size ranging from the following: Engine Displacement Engine RPM Boost Pressure Intercooler Efficiency Volumetric Efficiency 2000$54.99 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.