10 Long Tube Headers For 6.4 Hemi: Flow, Fitment, And Heat-ready Options 2026

⚡ Quick Verdict

📋 How We Evaluated

Each product received an assessment based on build quality signals such as stainless grade, mandrel bending, TIG welding, and flange thickness. Performance claims were judged by whether tube diameters and collector sizing support mid-to-high RPM scavenging. Value and suitability weighed available kit completeness, gasket/hardware inclusion, and the presence of usable rating signals, though none of these listings provided Amazon rating data.

Header Style	Shorty
Material System	Stainless steel with titanium ceramic
Country of Origin	Mexico
Package Quantity	1

What We Found

JBA’s stainless/titanium ceramic shorty header listing (1965SJT) is clearly aimed at Challenger/Charger/Magnum/300C applications, and the “shorty” form factor is the first limitation. This is not positioned as a long-tube header, and shorties typically don’t provide the same mid-to-high RPM scavenging that people look for from long tubes. The listing also doesn’t provide the kind of 6.4 Hemi-specific fitment details I’d need (flange outlet pattern, exact connection behavior, or how it mates to a 6.4 setup). With no price and no rating data, my read is that this leans more toward construction marketing than proven long-tube 6.4 compatibility.

Who It’s For

I would point buyers here if they want a thermal/heat-management upgrade for the classic Chrysler platform named in the listing—not if they’re specifically chasing a 6.4 Hemi long-tube build. The ceramic/titanium angle may appeal if you care about thermal control and appearance, but the shorty design plus unclear 6.4 swap fitment limits its practical value for a long-tube search.

Primary Tube/Collector Size	1-1/2 in. x 3 in.
Tube Material	16-gauge cold roll flash mild steel
Flange Thickness	5/16-inch steel plates
Joint Type	TIG welded; hi-temp paint rated to 500C

What We Found

This 1-1/2 x 3 in. mild steel black paint header listing is aimed at a GM truck/V8 setup (1966–1987 era) rather than Chrysler 6.4 Hemi. That doesn’t make the manufacturing claims irrelevant—it does mean it’s not a 6.4 Hemi long-tube option. Still, the build signals are fairly clear: mandrel-bent tubes made from 16-gauge cold roll flash mild steel, laser-cut 5/16-inch steel flanges, and TIG-welded joints designed to resist cracking and wear. It also claims a hi-temp paint coating rated up to 500C. My main takeaway is that the construction details are decent, but the engine/platform mismatch prevents it from being useful for a 6.4 Hemi long-tube decision.

Who It’s For

This fits best if you’re working with the GM applications listed and you want mandrel-bent tubes with TIG-welded, laser-cut flanges without jumping straight to stainless. The coating helps with corrosion concerns for daily driving. For 6.4 Hemi owners, the listing doesn’t provide the compatibility you need to feel confident about a real install.

Primary Tube Size	1-5/8 inch
Collector Size	2-1/2 inch
Tube Material	16-gauge 304 stainless (mandrel bent)
Flange Material/Thickness	5/16-inch CNC laser-cut steel, hydraulic-pressed flat

What We Found

This long tube header listing for 1988–1998 OBS Chevy/GMC K1500/K2500 4WD calls out 304 stainless steel construction, 1-5/8-inch primaries, and 2-1/2-inch collectors. It emphasizes mandrel-bent 16-gauge stainless tubes, CNC laser-cut 5/16-inch flanges, and joints intended for durability under thermal cycling. The fitment notes are fairly detailed for OBS trucks with 5.0L/5.7L small-block V8 engines, and it even mentions possible clearance work around the column-shift linkage or steering-related components. Where it falls apart for this specific search is the engine family: it’s not a 6.4 Hemi kit. So, I’d call it strong long-tube engineering—but not a valid solution for a 6.4 Hemi shortlist.

Who It’s For

These are best for someone restoring or upgrading the listed OBS GM trucks with the small-block combinations named. If you want stainless corrosion resistance and better mid-to-high RPM response, it’s the right direction within the GM world. The note about possible modifications also feels realistic for long-tube installs. For a 6.4 Hemi build, the engine mismatch stops it from being a practical buy.

Material	304 stainless steel (polished)
Design	Direct replacement manifold with shorty-style headers
Emissions Routing	Connects to OEM catalytic converter location
Included Kit Parts	Steel-clad fiber manifold gaskets and hardware

What We Found

This Ram 1500 5.7 Hemi shorty header set is marketed as a direct replacement for factory exhaust manifolds on specific Ram year/body combinations, with a clear installation intent. It uses polished 304 stainless steel and highlights thick laser-cut flanges and mandrel-bent tubing. The big selling point here is direct fitment clarity: it’s described as bolting to the cylinder heads and connecting to the OEM catalytic converter location, aiming to keep the existing emissions equipment routing without cutting or fabrication. The kit also includes steel-clad fiber manifold gaskets and installation hardware, which helps avoid the common “missing parts” friction people run into with exhaust manifold work. My read is that this is the most install-focused, leak-aware package shown among the items listed—though it’s still a shorty replacement and it’s not the 6.4 Hemi long-tube target.

Who It’s For

I’d recommend it to Ram 1500 5.7 Hemi owners who are dealing with cracked manifolds and want a straightforward path back to sealing and correct exhaust routing. It fits both 2WD and 4WD within the listed ranges on old body style models, and it’s aimed at reducing ticking and exhaust leaks without custom fabrication. If your real goal is a 6.4 Hemi long-tube performance setup, this won’t hit that target—but it does stand out for its bolt-on discipline.

Application	LS swap; C10 for 60-98 Chevy/GMC Silverado Sierra
Engine Family	LS series (unspecified in details)
Header Style	Long tube
Key Details	Not provided (no feature specs listed)

What We Found

This LS swap C10 long tube header listing has one of the biggest red flags for a buyer: it provides virtually no technical details beyond the category label. With “no features listed,” I can’t verify core specs like primary tube size, collector diameter, flange thickness, material grade, welding method, or whether gaskets are included. It also doesn’t connect the product to Chrysler 6.4 Hemi compatibility. Even if the header turned out to be well-built, the missing specifications make it hard to evaluate performance potential, durability, or seal strategy—so it’s not something I would feel comfortable using in a 6.4 Hemi long-tube decision.

Who It’s For

This would only make sense for LS swap builders shopping in a C10/Silverado/Sierra context. Even then, I’d still want the full fitment and construction confirmation before buying. For 6.4 Hemi long-tube shoppers, there’s no relevant compatibility or technical signal here to justify attention.

Product Type	Multi-layer stainless header gasket
Engine Fitment	Chrysler 6.1L/6.2L/6.4L; 2009 5.7L Hemi
Usage Guidance	Upgrade or replacement; often included in header kits
Part Number	SS-755872

What We Found

Kooks’ MLS header gasket part SS-755872 is not a header—it’s a gasket upgrade/replacement for Chrysler Hemi engines, including the 6.4L. The fitment note is specific to Chrysler 6.1L/6.2L/6.4L and also 2009 5.7L Hemi engines. That makes it the most directly relevant item in the bunch for a true 6.4 Hemi ecosystem, even though the goal here is “long tube headers.” The gasket is multi-layer stainless, which generally handles repeated heat cycles better than basic single-layer fiber/paper style seals. The listing also clarifies that gaskets are included in most header kits, positioning this part as an upgrade (or replacement if you lose/damage the originals).

Who It’s For

This works for anyone replacing leaking gaskets on a Chrysler 6.4 Hemi setup, especially if you already installed headers and want a better sealing solution. It’s also useful as maintenance planning—having a known-fit gasket option can reduce downtime if rework is needed. If you’re building a true 6.4 long-tube system, this can protect the investment by reducing the chances of exhaust leaks ruining your install outcome.

Primary Tube Size	1-3/4 inch
Collector Size	3 inch merge collectors
Flange Thickness	3/8 inch CNC-machined
Sealing System	MLS gaskets included; bolts included

What We Found

This LS swap long tube header kit is built around 73–87 C/K10 and certain square-body vehicles, and it explicitly targets LS conversion configurations rather than Chrysler 6.4 Hemis. It claims a complete kit experience with MLS gaskets and hardware, plus a flow-focused design featuring 1-3/4-inch mandrel-bent primaries and 3-inch merge collectors. The listing also highlights heavy-duty thick-wall steel tubing, CNC-machined 3/8-inch flanges, and TIG-welded joints to help prevent warping and early failure. On top of that, the black aluminized thermal barrier coating is meant to reduce corrosion and under-hood heat soak. The technical details are strong, but multiple fitment warnings narrow it to the LS swap world. Since it’s not a Chrysler 6.4 Hemi header application, I wouldn’t shortlist it for this category.

Who It’s For

I’d steer LS swap builders toward this if they’re working with the listed truck styles and want an included hardware/MLS sealing approach. The thermal barrier coating makes sense for daily-driven swaps that want less heat soaking. For a 6.4 Hemi build, the Chrysler mismatch is enough to make it a non-starter.

Primary Tube Size	1-7/8 inch
Outlet Size	3 inch
Fitment Constraint	Not for 4WD; LS series swaps only
Compatibility	C10 LS swap applications (2WD)

What We Found

This TMORACSIDSP C10 LS swap long tube header listing specifies 1-7/8-inch primary tubes and a 3-inch outlet, which sounds good on paper for LS swap exhaust flow. It also states they don’t fit 4WD and are intended only for LS-series engine swaps, not standard SBC/BBC setups. It further mentions compatibility with various swap target vehicles, but without detailed flange/collector specs, those broader claims feel hard to verify from the listing alone. The biggest limitation for this review is that there’s no material grade, welding method, or gasket inclusion detail provided—so durability and sealing strategy can’t be evaluated. For a 6.4 Hemi buyer, the LS-swap-only language removes any meaningful relevance.

Who It’s For

This listing is for LS swap builders who have already confirmed their engine family and plan around a 2WD/non-4WD C10 swap platform. The tube sizing could appeal if you want larger primaries. But because the build-quality details aren’t spelled out, I’d expect buyers to verify before committing. For a 6.4 Hemi long-tube search, there’s no clear fitment path here.

Vehicle Fitment	1973–1987 C/K10 and 1973–1991 square-body (listed)
Engine Fitment	Gen 1 SBC 265–400 V8
Collector Sealing	Copper collector gaskets; multi-layer copper/fiber header gaskets
Material	Polished 304 stainless; TIG-welded

What We Found

This polished stainless long tube header listing is aimed at 1973–1987 Chevy/GMC trucks (and certain square-body applications through 1991) and specifically covers Gen 1 SBC V8 engines. It includes copper collector gaskets and copper/multi-layer header gaskets, and it even gives an installation detail that matters for real clearance planning: it requires specific header spark plugs and calls out Accel 0576S or Accel 0414S with heat shields. The listing claims TIG-welded polished stainless steel construction and mentions hardware and 3-bolt collectors. That’s all useful information for SBC builders, but it’s not a 6.4 Hemi header. The engine mismatch makes it irrelevant to any meaningful 6.4 long-tube comparison, even though it serves as a good example of what a well-specified listing looks like.

Who It’s For

This suits classic GM truck owners running SBC engines in the ranges covered by the listing and those who value polished stainless appearance. It’s also a fit for builders who want the clearance guidance spelled out for spark plug fitment. Copper and multi-layer gasket inclusions are a plus for anyone planning sealing from day one. For 6.4 Hemi owners, the SBC focus makes it unsuitable.

Material	304 stainless steel
Flanges	CNC-machined; TIG-welded joints
Tube Design	Mandrel-bent tubes
Fitment Coverage	60–87 C10/C20/C30 2WD; select 88+ 2WD square body; not OBS

What We Found

Certified Automotive Experts long tube headers here are focused on LS swap applications in 60–87 Chevy & GMC trucks and certain 88+ 2WD square-body setups. The listing calls out 304 stainless steel construction, CNC-machined flanges, and TIG-welded joints, along with mandrel-bent tubes to support airflow. There’s also an explicit “does not fit OBS body style” note, which helps reduce mis-buys for GM truck buyers. However, it’s still LS swap oriented—not Chrysler 6.4 Hemi—and the listing doesn’t mention 6.4-specific geometry or emissions routing relevance. With no price and no rating data, I don’t have enough to justify treating it as a 6.4 Hemi solution.

Who It’s For

This is best for builders doing LS swaps in the listed 2WD square-body configurations who want stainless durability and careful flange machining. The OBS exclusion is helpful for narrowing compatibility quickly. For a 6.4 Hemi long-tube search, the LS-swap-only scope makes it the wrong category.

What to Look For Before Buying

If you’re shopping for the best long tube headers for a 6.4 Hemi, fitment accuracy matters more than generic power-talk. I would start by confirming the vehicle year/body style and making sure the listing explicitly supports the Chrysler 6.4 Hemi—not just “Hemi.” Then look for thick, flattened (or machined) flanges, mandrel-bent primary tubes, and weld quality that suggests durability under heat cycling. I’d also check whether the kit includes MLS gaskets and the right hardware, because incomplete header kits often turn into expensive rework after the first heat cycle.

Check Confirm exact 6.4 Hemi compatibility and emissions routing

Confirm exact 6.4 Hemi compatibility and emissions routing: Long tubes change exhaust geometry and can affect catalytic converter fitment. Make sure the listing actually supports the Chrysler 6.4 Hemi, not just “Hemi.” Look for wording about connecting to the OEM catalytic converter location, or whether it requires fabrication. Also check for clarity on O2 sensor placement and whether emissions equipment is meant to remain in place. When listings are vague, delays and extra cost usually follow.

Value Prioritize flange quality and gasket strategy

Leak prevention starts at the flange and sealing surface. I’d look for thick, CNC-cut flanges that are flattened or machined, then paired with quality MLS gaskets. If the kit omits gaskets or only includes basic fiber-type seals, plan on upgrading rather than hoping it holds. MLS stainless gaskets generally handle repeated heat cycling better, so factor the gasket cost into the real total price.

Rating Use rating signals, but treat missing ratings as a warning

Ratings can help you estimate how often a setup succeeds in real installs, but when no rating data is provided, I treat that as uncertainty—not a neutral sign. In that situation, I’d lean more heavily on what the listing actually publishes: tube sizing, flange thickness/finish, and welding method. Also be cautious with listings that say “no features listed,” since missing specs often correlate with incomplete kits and poor install outcomes.

Verify Plan for installation realities on long-tube setups

Long tube headers frequently require clearance work around steering linkage, brackets, and sometimes heat-shield related interference. I’d prioritize listings that call out likely interference points and what modification is expected. Then decide honestly whether your build allows cutting/welding or if you need a bolt-on approach. If fabrication is off the table, a shorter replacement or a setup built for direct fit sealing is sometimes the smarter path to “leak fixed” rather than “parts installed.”

Frequently Asked Questions

Are long tube headers actually worth it for a 6.4 Hemi?

They can be—long tubes can improve mid-to-high RPM flow by changing exhaust scavenging. But the real payoff depends on correct fitment and leak-free sealing. If the install requires heavy fabrication or it compromises emissions routing, the drivability and hassle can erase the gains. For many owners, properly matched manifolds or the right gasket strategy can deliver a better balance of improvement versus risk.

What specs matter most when choosing 6.4 Hemi long tube headers?

Primary tube diameter and collector size matter because they influence flow and scavenging. Flange thickness and whether the sealing surface is flattened or machined are major leak-prevention factors. Also pay attention to construction details like TIG-welded joints and stainless tube material for heat-cycle longevity. Finally, confirm O2 sensor and catalytic converter mounting compatibility so you don’t end up with an emissions-routing problem.

Why do headers still leak even when they’re stainless?

Stainless headers can still leak if flanges warp, bolts loosen, or the gasket material burns out. Uneven or thin flanges can create sealing gaps as the parts expand and contract with heat. If the gasket quality isn’t up to the job—especially on long-tube setups—you may need re-tightening or rework sooner than expected. Using MLS gaskets and correct torque practices helps reduce return work.

Can a header gasket upgrade improve the results of long tube headers?

Yes. A multi-layer stainless gasket generally handles repeated heat cycles better than basic fiber gaskets, and it can reduce how often you need to re-tighten after initial heat cycles. For Chrysler 6.4 Hemi builds, choosing an explicitly compatible MLS gasket is one of the easiest ways to improve sealing reliability—especially if your header kit doesn’t include premium seals.

How should fitment instructions be interpreted when listings mention modifications?

Clear modification notes are usually a good sign because they describe realistic interference and what it takes to make the fit work. If guidance mentions specific areas like linkage or bracket clearance, assume some level of trimming, spacer use, or bracket changes may be required. If warnings are missing or generic, fitment risk goes up. Before buying, verify that your project tolerates the stated modifications or choose a direct-fit alternative if it doesn’t.

🎯 Final Verdict

For the most install-realistic option shown here, I would lean toward the Ram 1500 5.7 Hemi direct replacement header kit with thick 304 stainless and an OEM catalytic converter connection. It stands out for seal discipline, included gasket/hardware, and bolt-on clarity—exactly the areas that usually cause the most long-tube headaches (leaks and routing). If you’re building a true 6.4 Hemi long-tube setup, the smartest support move from this list is the Kooks multi-layer stainless header gasket. Whatever headers you choose, confirm your exact 6.4 compatibility first, then pair the system with MLS gaskets to improve the odds of a reliable seal over repeated heat cycles.