Alternate Fire Camshaft

Features:

• Alternate fire design for smoother performance
• Improves drivability and engine response
• Ideal for towing and street applications
• Supports mild racing setups
• Stage 1 profile for balanced gains
• No valve reliefs required for install
• Fits 2001–2016 6.6L Duramax engines
• Enhances mid-range power delivery
• Direct upgrade for daily-driven trucks
• Engine harness modification required
• Includes clear installation instructions
• Built for long-term durability and strength

Street-Friendly Power Without the Hassle

If you’ve been thinking about upgrading your camshaft but don’t want to get into a full engine teardown or deal with piston clearance issues, the Wagler C6686-1 Alternate Fire Camshaft hits the sweet spot. Designed for 2001-2016 GM 2500HD and 3500HD trucks running the 6.6L Duramax, this Stage 1 cam brings smoother performance, better drivability, and a solid bump in power right where you use it most. The alternate fire design helps balance engine pulses for improved efficiency and a more refined feel behind the wheel, especially when towing or daily driving. It’s a great fit for truck owners who want meaningful gains without giving up street manners or reliability.

Built for the Real World, Not Just the Dyno

Wagler put real thought into making this camshaft practical. It supports towing, street use, and even mild racing setups, giving you a versatile upgrade that works across a range of builds. There’s no need to modify pistons or swap out your entire valvetrain, which helps keep the install approachable. However, you will need to make a few changes to the engine wiring harness, and Wagler includes detailed instructions to guide you through the process. Whether you’re hauling gear to the jobsite or just want your truck to pull a little harder off the line, this camshaft delivers real-world improvements without overcomplicating your build. It’s a smart, dependable upgrade from a brand that knows diesel performance.

Fitment: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax