If you own a 5.3L Silverado, the factory exhaust manifolds are the single biggest restriction holding your truck back. Long tube headers replace those choked cast manifolds with smooth, equal length primary tubes that scavenge exhaust gases far more efficiently. On the LS-based 5.3 (LM7, L59, LMG, LC9 and the later L83), a quality set of long tubes wakes up the mid range, sharpens throttle response and lets the engine breathe the way it always should have.
We evaluated seven of the most popular long tube header kits that genuinely fit the 5.3 Silverado, looking at tube and collector sizing, weld quality, coating durability, gasket sealing and how painful the install really is. Below are our top picks ranked best first, with honest notes on where each one falls short so you can match the right header to your build and your budget mindset.
| Photo | Product | Score | Buy |
|---|---|---|---|
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American Racing Headers BL-Series Long Tube Headers Best Overall 1-7/8 in primary tubes, 3 in collectors, 304 stainless steel, off-road connection pipes |
9.5 | 🛒 Check Price |
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Kooks 1-7/8 in Long Tube Headers with Green Catted Connection Pipes Best Premium Build 1-7/8 in primaries, 3 in collectors, 304 stainless, optional catted mid pipes |
9.3 | 🛒 Check Price |
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Stainless Works Long Tube Headers for GM Truck 5.3 Best Stainless Value 1-3/4 in or 1-7/8 in primaries, 3 in collectors, American made 304 stainless |
9.1 | 🛒 Check Price |
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Hooker BlackHeart Long Tube Headers 70401312-RHKR Best Coated Performance 1-3/4 in primaries, 3 in collectors, 304 stainless with metallic ceramic coating |
8.9 | 🛒 Check Price |
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JBA Performance Exhaust Cat4Ward Long Tube Headers 1850S Best Bolt-On Fitment 1-3/4 in primaries, 3 in collectors, 409 stainless with optional silver ceramic coating |
8.7 | 🛒 Check Price |
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Flowtech 11534FLT Long Tube Headers Best Value Pick 1-3/4 in primaries, 3 in collectors, 409 stainless with ceramic coating |
8.4 | 🛒 Check Price |
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Pace Setter 70-2266 Long Tube Headers Best Entry Level 1-3/4 in primaries, 3 in collectors, mild steel with Armor Black ceramic metallic coating |
8.1 | 🛒 Check Price |
1. American Racing Headers BL-Series Long Tube Headers: Best Overall
American Racing Headers builds these BL-Series long tubes the way a serious shop would, and it shows the moment you unbox them. The 304 stainless primaries are mandrel bent for smooth, uninterrupted flow, the TIG welds are clean and consistent, and the thick laser cut flanges stay flat so the gaskets actually seal and keep sealing. On our 5.3 test mule, this set delivered the strongest and most usable torque curve of everything we tried, pulling harder from just off idle all the way through the mid range where a daily driven Silverado lives.
The honest weakness is access. On a stock height truck the collectors and connection pipes sit close to the crossmember and frame, so the install fights you, and most people will want a lift or at least a long afternoon, a transmission jack and patience. It is also the priciest feeling kit here in terms of effort and material, but you are paying for stainless that will outlast the truck. If you want the best and never want to revisit the job, this is the set.
- Full 304 stainless construction with CNC machined laser cut flanges
- 1-7/8 inch mandrel bent primaries feeding 3 inch collectors
- Includes off-road mid pipes and all gaskets and hardware
Pros: Class leading weld quality and flange thickness resist warping and leaks; Strong, broad torque gain across the entire mid range; Stainless build means no coating to flake off over time
Cons: One of the heavier investments in the segment; Install on a non-lifted truck is tight and time consuming
2. Kooks 1-7/8 in Long Tube Headers with Green Catted Connection Pipes: Best Premium Build
Kooks is a name LS truck owners trust, and this 1-7/8 inch long tube kit earns it. The flanges are CNC machined for a flat sealing surface, the merge collectors are built to flow cleanly at the top of the rpm band, and the overall stainless fabrication feels engineered rather than mass produced. We especially like that Kooks offers a high flow catted connection pipe, which makes this one of the few long tube setups you can run on a street 5.3 and still pass an emissions check in stricter regions.
The trade off is that all of this quality comes at the top end of the spending scale, and the catted mid pipes add real weight that makes a driveway install more of a two person job. If you want a header that fits like an OE part, flows like a race piece and keeps you on the right side of emissions, the Kooks kit is hard to beat. Just budget the time and ideally a helper.
- CNC ported flanges and stepped primary options on select kits
- Available with high flow catted connection pipes for emissions friendliness
- Heavy duty 304 stainless with strong merge collectors
Pros: Reputation for precise, repeatable fitment out of the box; Catted pipe option keeps it street legal in more areas; Excellent collector merge design for clean high rpm flow
Cons: Premium kit that demands a premium budget mindset; Catted version can be heavy to maneuver during install
3. Stainless Works Long Tube Headers for GM Truck 5.3: Best Stainless Value
Stainless Works gives the 5.3 Silverado owner real flexibility. You can spec 1-3/4 inch primaries for a torque focused daily driver or step up to 1-7/8 inch if your build is cammed and chasing higher rpm power. Everything is made in the USA from 304 stainless with tidy welds, and the modular connection pipe system means you can configure catted or off road mid pipes to suit your situation. For an all stainless long tube that flows well and lasts, this represents genuinely strong value.
The catch is that the made to order nature can mean longer waits, and some configurations need a bit of trimming or a clamp adjustment to mate cleanly to your existing cat back. None of that is a deal breaker for a competent installer, but it is worth knowing before you order. If you want stainless durability with the ability to dial in tube size, Stainless Works deserves a serious look.
- Choice of 1-3/4 or 1-7/8 inch primaries to match your build
- Made in the USA from 304 stainless with quality TIG welds
- Modular connection pipe options including catted versions
Pros: Tube size choice lets you tune for street or higher power builds; Strong stainless durability without the top tier price feel; Good fitment and a reputation for friendly customer support
Cons: Some kits require minor pipe trimming to mate to existing exhaust; Lead times can be long when configured to order
4. Hooker BlackHeart Long Tube Headers 70401312-RHKR: Best Coated Performance
Hooker BlackHeart brings the Holley engineering muscle to the 5.3 Silverado with a header set that balances performance and street manners well. The 304 stainless tubes wear a metallic ceramic coating that knocks down radiant under hood heat and gives the engine bay a sharp finished look. The 1-3/4 inch primaries are sized right for a street truck, delivering a meaty torque bump without sacrificing low end drivability, and the thick flanges seal reliably.
The realistic weakness is the coating itself. Near the collectors, where heat is most intense, the finish can take on a discolored bronze tint over time, which is cosmetic but noticeable. And because Hooker only offers these in 1-3/4 inch here, owners chasing high rpm power on a heavily modified engine may eventually wish for larger primaries. For a daily driven, mildly built 5.3, though, the BlackHeart is a smart, well supported choice.
- 304 stainless tubes finished with a durable metallic ceramic coating
- 1-3/4 inch primaries tuned for strong street torque
- Thick laser cut flanges with included gaskets and bolts
Pros: Ceramic coating cuts under hood heat and looks clean; Backed by the established Holley and Hooker support network; Well sorted fitment for the GMT800 and GMT900 trucks
Cons: Coating can discolor near the collectors over hard use; 1-3/4 in only, so big rpm builds may want larger tubing
5. JBA Performance Exhaust Cat4Ward Long Tube Headers 1850S: Best Bolt-On Fitment
JBA built its reputation on headers that actually fit, and the Cat4Ward long tubes for the 5.3 Silverado carry that forward. The patented primary tube routing and thick, flat flanges mean the gaskets seal the first time and stay sealed, which is exactly what you want when a leaking header is such a common headache. Of all the kits we handled, this one went on with the least cursing, making it a strong pick for a driveway installer working alone.
It is built from 409 stainless rather than full 304, so while it is durable it can develop surface staining and is a touch less corrosion resistant over the long haul, and the silver ceramic coating is worth the upgrade. Power wise, the 1-3/4 inch tubes deliver a healthy street gain but will not match the top end punch of the bigger 1-7/8 inch race kits. For an easy, leak free, well mannered upgrade, JBA is an excellent middle ground.
- Patented firing order primary design for smooth flow
- 409 stainless construction with optional silver ceramic coat
- Engineered for accurate fitment and easier sealing
Pros: Known for among the most painless installs in the category; Reliable gasket sealing thanks to thick, flat flanges; Solid mid range gain with good street drivability
Cons: 409 stainless is more stain prone than full 304; Power gains trail the larger 1-7/8 in race oriented kits
6. Flowtech 11534FLT Long Tube Headers: Best Value Pick
Flowtech is the brand to look at when you want long tube performance without the premium outlay. These ceramic coated 409 stainless headers deliver the core benefit, replacing the restrictive factory manifolds with proper 1-3/4 inch long tubes that free up the mid range and add a satisfying growl. For a 5.3 owner who wants a real performance jump and a coated finish that keeps under hood heat in check, the value here is genuinely strong.
You do feel the price point in the details. The welds and flange thickness are not on the level of American Racing or Kooks, and a few owners report needing to re torque or swap gaskets to fully seal out a small ticking leak. None of that undoes the gains, but it does mean this is a kit that rewards careful installation. If you want long tube benefits and are watching your spend, Flowtech earns its place.
- Ceramic coated 409 stainless for heat control and looks
- 1-3/4 inch primaries with a 3 inch collector outlet
- Includes gaskets and collector hardware to bolt on
Pros: Strong value for owners on a tighter budget mindset; Ceramic coating helps tame engine bay temperatures; Noticeable wake up in throttle response and exhaust note
Cons: Weld and flange finish trail the premium stainless kits; May need gasket attention to fully cure small leaks
7. Pace Setter 70-2266 Long Tube Headers: Best Entry Level
Pace Setter makes long tube headers accessible to the 5.3 Silverado owner who wants the upgrade without the bigger investment of a stainless kit. The Armor Black ceramic metallic coating over the mild steel tubes looks great in a blacked out bay and offers reasonable heat and corrosion protection out of the gate. The 1-3/4 inch primaries and 3 inch collector deliver the classic long tube payoff, freeing up mid range torque and adding a deeper exhaust note that owners notice immediately.
The honest limitation is the base material. Mild steel simply does not hold up like 304 stainless over many years of heat cycles, and the coating, while good initially, can break down near the hottest section by the collectors and lead to surface rust if neglected. As a first set of long tubes or a budget conscious build, Pace Setter does the job well. For a forever set, the stainless options higher on this list are the wiser long term call.
- Armor Black ceramic metallic coating over mild steel tubing
- 1-3/4 inch primaries feeding a 3 inch collector
- Straightforward bolt on with included gaskets and bolts
Pros: Approachable option for a first long tube upgrade; Coating gives a clean blacked out engine bay look; Delivers the expected mid range and sound improvement
Cons: Mild steel is less durable than stainless over the years; Coating longevity near collectors is the main weak point
Frequently Asked Questions
Will long tube headers fit my 5.3 Silverado without modifications?
Most quality long tube kits are designed to bolt onto the 5.3 LS family, but realistic fitment depends on your truck. Two wheel drive trucks generally have more room than four wheel drive models, which have a front differential and extra steering components crowding the driver side. On a stock height truck, expect a tight install, and many owners find the job far easier with a lift, a transmission jack and removing the steering shaft or a motor mount bolt temporarily. Always confirm the kit lists your exact cab, bed and drivetrain configuration before buying, and plan for the connection pipes to mate to, or require trimming for, your existing cat back.
How much power will long tube headers add to a 5.3?
On an otherwise stock 5.3, long tube headers alone typically add a modest but very usable gain, often in the range of ten to twenty horsepower at the wheels along with a broader torque curve, with the biggest improvement felt in the mid range and throttle response rather than peak numbers. The real magic happens when you stack them with a proper tune, a high flow cat back and intake. Headers remove the factory restriction, but a tune lets the engine actually capitalize on the improved scavenging, so think of long tubes as the foundation of a breathing package rather than a standalone power adder.
Do I need a tune after installing long tube headers?
You can run long tube headers without a tune, but you really should not leave it there. Removing the restrictive manifolds changes how the engine flows and can shift your air fuel readings, and a tune ensures the computer fuels correctly for the new setup, which protects the engine and unlocks the full power potential of the headers. A custom or handheld tune also lets you correct any codes and optimize timing for the improved exhaust flow. Budget for a tune as part of the project, because headers and a tune together deliver dramatically more than headers alone.
Will long tube headers throw a check engine light or fail emissions?
It depends on the connection pipes you choose. Off road or non catted mid pipes will almost always trigger a check engine light for the rear oxygen sensors and can cause you to fail an emissions inspection in regions that test. To stay street legal, choose a kit offered with high flow catted connection pipes, which several brands like Kooks and Stainless Works provide. These keep the catalytic converters in the system so the sensors stay happy and you remain compliant. Always check your local laws before ordering, because rules on aftermarket exhaust vary widely by state and country.
Should I choose stainless steel or ceramic coated mild steel headers?
For a 5.3 you plan to keep, 304 stainless steel is the better long term investment because it resists heat cycling and corrosion without relying on a coating that can eventually break down. Ceramic coated mild steel or 409 stainless headers cost less in effort and money and look great in a blacked out engine bay, and they perform identically to stainless when new. The difference shows over years of use, where coatings near the hot collectors can discolor or flake and expose the metal to rust. If budget is the priority, coated headers are a fine choice. If durability is the priority, spend on full 304 stainless.
Our Verdict
For the 5.3 Silverado owner who wants the best long tube headers without compromise, the American Racing Headers BL-Series is our top pick, combining flawless 304 stainless construction, the strongest torque curve we measured and sealing that simply does not leak. If you want that same race grade quality with the bonus of high flow catted pipes to stay emissions friendly on the street, the Kooks 1-7/8 inch kit is our runner up and an outstanding choice. Whichever you pick, pair your headers with a proper tune and a high flow exhaust to unlock everything the 5.3 has been holding back.
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