Chevy Exhaust Manifold Headers

Why Does Your Chevy Need a Set of Exhaust Manifold Headers?

Factory Log Manifolds Choke Exhaust Flow and Kill Horsepower

The stock cast iron log manifolds on a Small Block Chevy 350 or a Vortec truck V8 force exhaust pulses to crash into each other inside a short, sharp cast passage.
That collision builds backpressure, kills scavenging, and leaves horsepower and torque sitting on the table.
Long tube and shorty headers use equal-length, mandrel-bent primary tubes to pull exhaust out of the cylinder, freeing up power the factory manifold was never designed to move.

Cracked Cast Iron and Thermal Fatigue from Sustained Heat

OEM cast iron manifolds warp, crack, and blow out gaskets because they live at the edge of their heat limit every time you tow, haul, or run a performance cam.
Once a manifold warps it pulls the mounting surface out of flat, snaps the flange bolts, and opens the leak that causes the ticking noise at cold start.
Cast iron begins to fail above roughly 1,400 degrees Fahrenheit, which is exactly where a hard-worked engine wants to push it.

Stuck Bolts, Blown Gaskets, and the Ticking That Will Not Quit

Broken exhaust manifold bolts and leaking gaskets are some of the most common complaints on high-mileage Chevy trucks.
The leak throws off oxygen sensor readings, trips the check engine light, hurts fuel economy, and lets exhaust gas reach the cabin.
Chasing that tick with another paper-thin factory gasket only buys you time, not a fix.

What Can a Set of Exhaust Manifold Headers Solve?

Mandrel-Bent Primary Tubes Restore Scavenging and Torque

Smooth, constant-diameter primary tubes keep exhaust velocity high so each pulse helps pull the next one out of the cylinder.
Matched primary lengths even out cylinder-to-cylinder distribution and bring back low-end torque and mid-range pull that the log manifold stole.

Thick CNC Flanges and Stainless Hardware End the Leak Cycle

3/8-inch and 1/2-inch CNC-machined flanges stay flat through thousands of heat cycles, so the gasket seals once and stays sealed.
Premium graphite gaskets and stainless fasteners resist blowout and corrosion, stopping the ticking and the broken-bolt routine for good.

T304 Stainless and High-Silicon Moly Survive the Heat

T304 stainless long tube headers shrug off corrosion and hold their shape under high exhaust gas temperatures, while high-silicon moly cast iron shorty headers carry the heat resistance of a factory manifold with far better flow.
Lower underhood and exhaust gas temperatures protect everything around the engine and keep the bay livable.

Shop Chevy Exhaust Manifold Headers by Chevrolet and GMC Engine & Fitment Guide

• Long Tube Headers w/ Y-Pipe - Fits 5.3L and 6.2L EcoTec3 V8 in Chevy Silverado 1500 and GMC Sierra 1500 (2014-2017). Replaces the cracked factory manifold and adds a smooth Y-pipe for improved flow on the K2xx generation.
• Long Tube Headers w/ Gaskets - Fits 4.8L, 5.3L, and 6.0L Vortec V8 in Chevy and GMC Silverado and Sierra (2007-2014). Cures the broken-bolt tick on the GMT900 generation with thick flanges and included gaskets.
• Exhaust Manifold Headers - Fits 4.8L and 5.3L Vortec V8 in GMC Yukon and GMC Sierra 1500/2500 (1999-2001). Drops right into the GMT800 generation to restore lost torque.
• Exhaust Manifold Headers - Fits 5.0L and 5.7L TBI and Vortec V8 in Chevy and GMC C1500, C2500, K1500, K2500 (1988-1997). Solves warped log manifolds on the OBS C/K square-body trucks.
• Long Tube Headers w/ X-Pipe - Fits 5.7L LS1 in Chevy Corvette C5 (1997-2004). 1-7/8-inch primaries and an X-pipe sharpen scavenging and exhaust note.
• LS Swap Headers - Fits LS1, LS2, LS3, LS6, and LS9 in Chevy and GMC C-10 Pickup (1960-1986). Clears the chassis on classic C10 LS swaps with proper steering and plug access.
• Stainless Exhaust Manifold Headers - Fits 2.2L in Chevy S10 and GMC Sonoma (1994-2004). Direct bolt-on for the S-series compact truck.
• Racing Shorty Headers - Fits Small Block Chevy 283, 305, 327, 350, and 400 V8 (1970-1996). Compact shorty fit for tight engine bays and classic muscle cars like the Camaro, Nova, and Chevelle.
• SBC Truck Headers - Fits Small Block Chevy 283, 302, 305, 307, 327, 350, and 400 in Chevy Blazer, S10, and S15 2WD (1970-1996). Built for truck chassis that need clearance around steering and motor mounts.
• SBC Long Tube Headers - Fits Small Block Chevy 262, 265, 283, 305, 327, 350, and 400 (1955-2003). The classic Gen I small block fit, including marine and turbo-friendly builds where header flow is a real advantage.

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What does a Chevy exhaust manifold do, and why should I upgrade to headers?

A Chevy exhaust manifold collects burnt exhaust gas from the cylinder head and routes it into the exhaust system.
The factory part is a heavy, restrictive cast iron log that was built for cost and packaging, not flow.
Upgrading to tubular headers with mandrel-bent primaries improves exhaust scavenging, lowers backpressure, and lets the engine produce more horsepower and torque than the stock manifold ever could.

What are the symptoms of a cracked Chevy exhaust manifold?

The most common sign is a ticking or tapping noise at cold start that often quiets down as the metal expands and the crack closes.
You may also smell exhaust in the cabin, see white soot buildup around the flange, hear a rattle at certain RPM, or find the check engine light on from a skewed oxygen sensor reading.
Visible hairline cracks, lost power, and worse fuel economy usually follow if the leak is left alone.

How much horsepower do Chevy headers add to a Small Block 350?

On a typical street Small Block Chevy 350, a good set of long tube headers is worth roughly 15 to 30 horsepower over the stock manifold, along with a noticeable gain in torque.
The exact number depends on the rest of your combination, including the cam, intake, and exhaust diameter behind the headers.
Headers add the most when the rest of the engine is already set up to breathe, and correct primary sizing matters more than just going big.

What is the difference between long tube and shorty headers?

Long tube headers use longer primary tubes that merge farther back, which produces stronger scavenging and the best top-end power, but they need more clearance and more install labor.
Shorty headers keep the primary tubes short so they bolt close to the factory location, making them an easier fit in tight muscle-car and truck engine bays.
Shorty headers are the right call when you want a clean upgrade without fighting steering, chassis, or starter clearance.

Will these exhaust manifold headers fit my Small Block Chevy 350?

Fitment depends on your exact engine family, cylinder head, and chassis, so always confirm the listed engine and year range before you buy.
Small Block Chevy headers here cover the Gen I 262, 265, 283, 305, 327, 350, and 400 cubic inch engines, and truck headers are listed for specific chassis like the S10, Blazer, and C/K.
If you are unsure which set fits your build, our 24/7 live support will confirm the correct part before it ships.

Are stainless steel or cast iron exhaust manifolds better for a Chevy?

Both have a place depending on the build.
T304 stainless tubular headers resist corrosion, hold their shape at temperature, and flow far better than a stock log manifold, which is why they dominate street and track builds.
High-silicon moly cast iron shorty headers carry the heat durability and leak resistance of a factory casting while still improving flow, which makes them a smart choice where a stainless tube will not clear.

Can I use Small Block Chevy exhaust manifolds for marine and turbo builds?

The Small Block Chevy is one of the most swapped engines in marine and turbo applications, and exhaust flow is where those builds live or die.
A set of high-flow headers or shorty manifolds improves scavenging that helps both a marine small block breathe at sustained RPM and a turbo setup spool faster and run cooler.
For raw turbo heat above roughly 1,400 degrees Fahrenheit, pair the headers with a proper turbo-friendly layout and confirm your flange and clearance details with support first.

How long do Chevy exhaust manifolds last, and when should I replace them?

A healthy exhaust manifold can last the life of the vehicle, but high-mileage Chevy trucks commonly start ticking after years of heat cycling, towing, and cast iron fatigue.
Replace yours when the cold-start tick will not go away, when bolts are snapped or the flange is visibly warped or cracked, or when the oxygen sensor starts throwing codes from a leak.
Catching it early protects your gaskets, your sensors, and your fuel economy.

Do these Chevy headers come with gaskets and hardware, and is installation hard?

Many of our long tube and shorty header sets ship with high-temperature gaskets and stainless hardware so you are not sourcing parts mid-install.
Installation difficulty ranges from a straightforward bolt-on for shorty headers to a longer job for long tubes that may need working around the starter, steering linkage, and factory Y-pipe.
A shop lift and a torch for stubborn factory bolts make the job far easier, and our support team can walk through the tricky steps.

Are Chevy exhaust manifold headers legal for street use?

Performance exhaust headers are intended for competition and closed-course off-road use only, and many aftermarket headers are not emissions-legal in states such as California that follow CARB standards.
It is your responsibility to check local and state emissions laws, confirm exact vehicle fitment before purchase, and run the parts only where allowed.
These headers ship free with a one-year warranty and our 45-day return policy, so you can verify fitment and compliance risk-free.