Merchant 10298 Injector Copper | 2004.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features: - Fits LLY, LBZ, LMM, LML, and LGH - Includes 8 copper injector washers - OE-spec construction for reliable sealing - Maintains proper injector compression - Prevents fuel leaks and blow-by - High-quality copper for long life - Designed for easy installation - Built to meet factory performance Injector Copper for GM Duramax If you're swapping out injectors on your Duramax, don’t cut corners—especially on the small parts that make a big difference. The Merchant Automotive Injector Copper Seals are a must-have for any injector service on your 6.6L Duramax. This 8-pack of copper washers is built to OEM specs and designed to deliver a proper seal every time, giving you peace of mind that your fuel system is buttoned up right. These copper seals sit between the injector and the cylinder head, and their job is to keep combustion gases from sneaking past—something that can lead to blow-by, poor performance, or even injector damage if ignored. Over time, the original seals can lose their shape and effectiveness, especially if they've been exposed to high heat or removed during maintenance. That’s where these replacements come in. With precision-machined copper and a reliable OE-style fit, you’re getting a seal that won’t let you down under pressure. Fits: 2004.5, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM 6.6L Duramax