Swapping out your factory manifolds for some 2011 camaro ss long tube headers is probably the single best move you can make if you're serious about waking up that LS3 or L99 engine. If you've spent any time on the forums or at local meetups, you know the stock exhaust manifolds on the 5th Gen Camaro are pretty restrictive. They're heavy, cast-iron pieces designed more for quiet commutes and emissions than for raw performance. When you switch to long tubes, you're essentially letting the engine breathe for the first time, and the difference in both sound and "butt-dyno" feel is massive.
Why Long Tubes Over Shorties?
A lot of guys ask if they can just get away with shorty headers because they're easier to install and usually street-legal in more places. Honestly? If you're looking for real gains, don't waste your time. Shorties are basically just smoother versions of your stock manifolds. They might give you a tiny bump in the mid-range, but they don't offer the scavenging effect that makes long tubes so legendary.
Long tube headers work by using the velocity of the exhaust gases to "pull" the spent air out of the cylinder. Because the primary tubes are so much longer, the pulses of exhaust don't interfere with each other as they head toward the collector. This creates a vacuum effect that helps draw in the fresh air-fuel mixture on the intake stroke. In short: more air in, more air out, and a lot more horsepower at the wheels.
Picking the Right Primary Size
When you start shopping for 2011 camaro ss long tube headers, you're going to run into a choice between 1 7/8-inch and 2-inch primaries. This is where a lot of people get stuck.
For a mostly stock or bolt-on 2011 SS, 1 7/8-inch primaries are usually the sweet spot. They provide plenty of flow for the 6.2L engine while keeping the exhaust gas velocity high, which preserves your low-end torque. You don't want to lose that "stoplight-to-stoplight" grunt just to chase a peak horsepower number you'll only see at 6,000 RPM.
However, if you're planning on adding a blower, a big cam, or a shot of nitrous down the road, you might want to go with the 2-inch headers. They can feel a little "soft" at low RPMs on a stock motor, but once you start pushing serious air with a supercharger, those smaller primaries can actually become a bottleneck. It's all about planning for where your car is going to be in a year or two.
Materials and Construction
You're going to see a wide range of prices out there. You might find a set for $400 on an auction site and another set for $1,800 from a name brand. The difference usually comes down to the grade of stainless steel and the quality of the welds.
T304 Stainless Steel is the gold standard. It won't rust, it handles heat cycles like a champ, and it'll probably outlast the car itself. Cheaper headers often use 409 stainless or even mild steel with a coating. While those are fine for a budget build, they can eventually discolor or develop surface rust, especially if you live somewhere where they salt the roads.
Also, look for mandrel-bent tubing. This ensures the pipe stays the same diameter through every curve. Cheap headers are often "crush bent," which creates kinks in the turns that kill your airflow. If you're going through the trouble of an install, you want the smoothest path possible for those exhaust gases.
The Installation Reality Check
I'm not going to sugarcoat it: installing 2011 camaro ss long tube headers in your driveway is a bit of a project. It's not "engine swap" hard, but it's definitely "spend a whole Saturday under the car" hard.
The biggest pain point on the 5th Gen Camaro is the steering shaft. You'll almost certainly have to unbolt it and move it out of the way to slide the driver-side header into place. It's also a very tight fit near the spark plugs and wires. While you have the headers off, it's a great time to upgrade to some high-quality ceramic boot spark plug wires. The heat coming off those long tubes is way higher than the stock manifolds, and the last thing you want is a melted wire causing a misfire three days after your install.
Another tip? Throw away the gaskets that come in the box with cheaper headers. Go buy a set of OEM multi-layer steel (MLS) gaskets. They are way more reliable and far less likely to develop a leak a few months down the road. There's nothing more annoying than a "tick-tick-tick" exhaust leak right after you finished a big job.
Cats or No Cats?
This is a big one. Long tube headers usually come in two flavors: with high-flow catalytic converters or with "off-road" connection pipes (no cats).
High-flow cats are the way to go for 90% of people. They keep the smell down—without them, your car is going to smell like a 1970s lawnmower—and they take some of the "rasp" out of the exhaust note. Plus, they make it a lot easier to pass visual inspections if your state requires them. Modern high-flow cats are so efficient that you're only losing maybe 2-5 horsepower compared to a straight pipe, which is a trade-off most guys are happy to make.
Don't Forget the Tune
You can't just bolt on 2011 camaro ss long tube headers and call it a day. Since the headers move the position of the O2 sensors, your car's computer is going to get confused. You'll almost certainly trigger a Check Engine Light (CEL) because the sensors aren't heating up as fast as they used to, or because the rear sensors think the cats are "missing" (even if you have high-flow ones).
More importantly, your engine will likely run a bit lean. The headers are pulling so much more air through the engine that the stock fuel tables can't always keep up. A custom tune—whether it's from a local shop or a reputable remote tuner—is essential. It'll clear the CEL, optimize your air-fuel ratios, and usually unlock another 10-15 horsepower on top of what the headers gave you.
The Sound Difference
Let's be honest, the main reason we do this is for the sound. A 2011 Camaro SS with long tubes sounds like a completely different animal. At idle, it gets a deeper, more rhythmic "thump." But when you hit the gas and get into the higher RPM range, it turns into a pure mechanical scream.
If you still have the stock mufflers, the headers will make them sound a bit more aggressive but still manageable. If you already have an aftermarket cat-back exhaust, be prepared—it's going to get loud. Some setups can get pretty raspy or "tinny," so if you want to keep that deep muscle car growl, look for headers with a nice merged collector and maybe add a resonated X-pipe if the drone gets to be too much.
Final Thoughts
Adding 2011 camaro ss long tube headers is a milestone for any 5th Gen owner. It's the bridge between a "slightly faster than stock" car and a serious performance machine. You're looking at gains of anywhere from 25 to 40 rear-wheel horsepower once you factor in the tune, which is a massive jump for a bolt-on part.
Just make sure you do it right the first time. Buy the good gaskets, get some heat-resistant plug wires, and definitely budget for a tune. Your Camaro will thank you every time you hit the remote start and hear that V8 roar to life. It's one of those mods where, once you do it, you'll wonder why you waited so long.