Side Exit Exhaust on a LB7

So, you're eyeing a 5-inch side exit exhaust for your LB7 Duramax, huh? Let me tell you, it's a game-changer! I recently made the leap, and I've got to share my experience. Choosing a 5-inch system for an LB7 isn't just about making your diesel truck sound beastly – though it definitely does that. It's often about optimizing exhaust gas temperatures (EGTs), especially if you're towing heavy or have performance modifications. The larger diameter allows for better flow, which helps the turbo spool quicker and can even contribute to a slight bump in horsepower and torque. Now, why side exit? For me, it was a mix of aesthetics and practicality. I love the aggressive look it gives the truck, especially with the exit right in front of the rear wheel. Plus, if you're frequently hitching up trailers, a side exit means you don't have exhaust fumes constantly blowing directly onto your trailer. Installation was fairly straightforward, but definitely a two-person job if you want to save your back! I'd recommend having a good set of tools, some penetrating oil for those old bolts, and plenty of patience. Make sure to properly align everything before tightening, as a loose fit can lead to annoying rattles or leaks. The sound? Oh man, the sound! My LB7 now has a deep, throaty rumble that's just addictive. At idle, it's a commanding presence without being obnoxious. When you get on the throttle, it really opens up with that signature Duramax growl. On the highway, there's a bit of drone, as expected with a larger, less restrictive system, but it's manageable for daily driving. I've found that setting your cruise control just right can minimize it. Before I committed, I did a ton of research, watching countless YouTube videos of different setups. I compared brands and materials, ultimately going for a stainless steel kit for its durability and corrosion resistance – essential for any truck that sees varied weather. Also, consider if you want a muffler or a straight pipe. I opted for a less restrictive muffler to maintain some civility, but many go full straight pipe for maximum sound. Just be aware of local noise ordinances! Overall, upgrading to a 5-inch side exit exhaust on my LB7 has been one of my favorite modifications. It truly transforms the driving experience, both in terms of sound and the subtle performance gains. If you're on the fence, I say go for it – you won't regret hearing that Duramax sing!