Wagler C6658.1 Street Girdle | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Features:

• One-piece 1/2" thick steel girdle
• Supports Duramax LML bottom-end strength
• Ties main caps to oil pan bolts
• Includes ARP main studs and nuts
• ARP cross bolts and washers included
• Lube packet provided for easy install
• Comes with oil pan hardware
• Pick-up tube hardware included
• Extended fasteners for proper fitment
• Fits 2011–2016 6.6L Duramax LML
• Requires machining on factory main caps
• Proudly manufactured in the USA

Lock Down the Bottom End of Your LML

If you're putting serious power through your 2011 to 2016 Duramax, it's only a matter of time before the bottom end starts to show its limits. The Wagler C6658.1 Street Girdle gives you the reinforcement your LML needs to stay solid under stress. Whether you’re towing heavy loads or running a high-performance tune, tying the main caps to the oil pan bolts helps prevent block distortion and cap movement—two things that can lead to catastrophic failure when left unchecked. This girdle is machined from a single piece of half-inch steel, giving your engine a solid foundation to handle higher output without flinching.

All-In-One Kit That’s Ready to Install

What sets Wagler’s kit apart is how complete it is right out of the box. It comes with ARP main studs, cross bolts, washers, and even a lube packet to make installation smoother. You also get new hardware for both the oil pan and pick-up tube, and the fasteners (aside from the cross bolts) are all extended for a proper, no-stress fit. Like any serious performance upgrade, you’ll need to machine the factory main caps to accept the girdle, but once it’s installed, you’ve got peace of mind knowing your bottom end is far more secure. It’s a smart move for anyone pushing the limits of their LML, and like the best upgrades, it works quietly behind the scenes while you stay focused on the road ahead.

Fits: 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML