Sierra 18-8829-1 Mercruiser HEI V6 Spark Plug Wire SetFor Mercruiser 4.3L MPI with Delco HEI ignition. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements.Interchangeable with: Mallory; 9-28057; Mercury Marine; 84-863656A2; Application:Mercruiser Stern Drive 4.3L MPI Alpha/Bravo - 1998; 0W310000 thru 0W649999; 0W650000 thru 0W658582; 0W658583 thru 0W658583; 0W658584 thru 1A030367; 1A030368 thru 1A030369; 1A030370 thru 1A063239; 1A063240 & Up; 4.3L MPI Alpha/Bravo EC- 1998; 1A637496 & Up; Marine Power 5.7L Vortec RWC 2005 - Up; 5.7L Vortec FWC 2005 - Up;