If you're tired of looking at that mess of wires on top of your engine, installing some ls valve covers with coil covers is probably the best weekend project you can tackle. Let's be real for a second: the LS platform is an absolute beast when it comes to power and reliability, but it isn't exactly a beauty queen straight from the factory. The way GM decided to just bolt those ignition coils right on top of the valve covers makes the whole top end look like a disorganized bird's nest of wires and plastic.
It's one of those things that once you notice it, you can't un-see it. You spend all this time cleaning up your engine bay, tucking wires, and painting the firewall, only to have these ugly grey coils sitting right in the middle of the frame. That's exactly why the combo of new valve covers and matching coil covers has become such a staple in the car community. It's an easy way to get that clean, high-end look without having to go through the massive headache of a full coil relocation kit.
Why the Factory Setup Looks So Messy
When GM designed the LS series—whether it was the original LS1 or the later LS3s and truck engines—they were thinking about efficiency and serviceability. Mounting the coils directly over the spark plugs kept the plug wires short, which is great for a strong spark and less interference. Functionally, it's a win. Aesthetically? It's a total disaster.
Most factory LS valve covers are just plain cast aluminum. They get stained over time, they've got those awkward mounting studs sticking up, and they're covered in grime. When you add the coil brackets and the wiring harness on top, it just looks cluttered. If you're building a show car or even just a clean street truck, that "industrial" look usually doesn't cut it. Using ls valve covers with coil covers allows you to keep the coils in their functional home while completely hiding them from view.
The "Big Block" Aesthetic
One of the coolest things about using a set of ls valve covers with coil covers is that it changes the visual proportions of the engine. Because the coil covers sit higher and wider than the standard valve covers, they give the LS a much broader, more muscular stance. It actually mimics the look of an old-school big block Chevy or even a vintage HEMI, depending on the style you go for.
You get that wide, "heavy-duty" appearance that fills out the engine bay much better than the narrow factory covers. It's a neat trick because the engine hasn't physically changed size, but to anyone looking under the hood, it looks significantly more substantial.
Dealing with the Coil Relocation Headache
A lot of guys think the only way to get a clean look is to move the coils to the firewall or hide them under the dash. I've been down that road, and honestly, it's a pain. You have to buy or make custom-length spark plug wires, you have to figure out where to mount the brackets, and you often end up drilling holes in your firewall. Plus, if a coil ever fails, you're digging around in a cramped space just to swap it out.
With ls valve covers with coil covers, you get the "hidden coil" look without any of the relocation drama. The coils stay right where they belong on the engine. The new valve covers usually have the mounting points built-in, and the outer cover just snaps or bolts over the top. It's the ultimate "cheat code" for a clean engine bay. You get the visual benefit of a wire tuck without actually having to rewire your ignition system.
Clearance for Aftermarket Parts
If you've started modifying your LS, you might have run into clearance issues already. High-lift cams often require upgraded rocker arms, and those bigger rockers don't always play nice with the shallow factory valve covers. Many of the aftermarket ls valve covers with coil covers are designed to be "tall" versions.
This extra height gives your valvetrain more room to breathe. It's a functional upgrade disguised as a cosmetic one. You won't have to worry about your rocker arms smacking the top of the cover at high RPM, which is a pretty expensive sound to hear. Just make sure you check your hood clearance, especially if you're running a low-profile car like a Corvette or a slammed C10.
Choosing Your Finish
When you're looking at these kits, the finish is what really makes the engine pop. You generally have a few main directions you can go:
- Polished Aluminum: If you want that classic hot rod look that shines like a mirror, this is it. Just be prepared to spend some time with a microfiber towel keeping the fingerprints off.
- Powder Coated: This is probably the most popular choice. Whether it's a "crinkle" black for a stealthy look or a bright Chevy Orange to pay homage to the classics, powder coating is tough and hides dirt well.
- Carbon Fiber: For the modern pro-touring builds, carbon fiber covers look incredible. They're lightweight and give off a very high-tech vibe.
What About the PCV System?
One thing people often forget when swapping their valve covers is the PCV (Positive Crankcase Ventilation) system. The factory covers have specific baffles and ports built into them. When you switch to ls valve covers with coil covers, you need to make sure the new set has proper baffling.
If you buy a cheap set without good baffles, your engine might start sucking oil into the intake, which leads to smoke and carbon buildup. Most reputable brands have this figured out, but it's always worth double-checking. You'll also need to decide if you're going to run a breather or stick with a closed loop system.
Installation Is Pretty Straightforward
You don't need to be a master mechanic to pull this off. It's a basic hand-tool job that usually takes a couple of hours if you're taking your time. The main thing is to be careful with the wiring harness. Those old plastic clips on the coil connectors can get pretty brittle from the engine heat, so don't go yanking on them or you'll be heading to the parts store for new pigtails.
Usually, you'll just unbolt the coil packs as a unit, swap the valve covers (use new gaskets!), bolt the coils back onto the new covers, and then finish it off with the outer coil covers. It's satisfying because the transformation is instant. You go from a cluttered mess to a show-ready engine bay in the span of a Saturday afternoon.
Final Thoughts on the Upgrade
At the end of the day, an engine swap or a build isn't really finished until the aesthetics match the performance. You could have a 600-horsepower LS under the hood, but if it looks like a pile of wires and greasy plastic, people aren't going to give it the respect it deserves.
Investing in ls valve covers with coil covers is one of those rare mods that offers a massive visual impact for a relatively small amount of work. It cleans up the "junk" on top of the motor, provides better clearance for performance parts, and gives you a chance to add some personal style to your build. Whether you're going for a vintage look or a sleek modern vibe, it's a solid move that you'll appreciate every time you pop the hood.