Tune-up Kit for Delco-Style EST Inline 4 cyl Replaces Mercruiser Tune Up Kit 811635Q2 and Wire Set 816761Q14 (816761A14) Includes Cap and Rotor and PREMIUM stainless core 8MM Wires with high-temp silicone sleeves! Fits many 3.0L and LX applications from 1991 and up. Only fits Delco EST ignitions. If you do not know your ignition type, please contact us via email with your serial number. Our wires have 45 degree boots instead of the standard 90 degree for easier installation.