5.7 HEMI Exhaust Manifold

Why Does Your 5.7 HEMI Need an Exhaust Manifold?

Thermal Fatigue Shears the Factory Manifold Bolts

The aluminum HEMI cylinder head and the cast iron factory manifold expand and contract at different rates on every cold start and shutdown.
Across thousands of heat cycles those undersized factory bolts fatigue, corrode at the head, and snap off flush, most often at the front of the manifold and on the driver side where the heat is concentrated.
One broken bolt is enough to lose clamp load and start an exhaust leak, and the remaining bolts usually follow.

Cast Iron Warping and Cracking Opens Exhaust Leaks

Once a bolt lets go, the manifold is no longer held flat against the head and begins to warp under its own heat.
The thin OEM casting then cracks between the runners or at the mounting ear, and the leak only gets louder as the gap grows.
This is the root of the cold start ticking that quiets as the manifold expands, and the steady ticking that never goes away once the damage is permanent.

Exhaust Leaks, Soot Tracking, and O2 Sensor Damage

An unchecked manifold leak does more than make noise.
Hot exhaust gases escape straight into the engine bay, leaving black soot around the ports, cooking the oxygen sensors, and in severe cases eroding the sealing surface of the cylinder head.
The front O2 readings drift, fuel trims go lean, and you start chasing check engine codes that no sensor swap will ever fix.

What Can an Exhaust Manifold Solve?

Thick CNC-Machined Flanges Resist Warping

Our manifolds and headers use 1/2-inch thick CNC-machined mounting flanges that stay flat under full thermal load, keeping every port sealed to the head and stopping the warping that cracks factory castings.

T304 Stainless Tubular Flow Drops Backpressure

Mandrel-bent 1-5/8-inch T304 stainless primary tubes and smooth merged collectors cut pumping losses and exhaust backpressure, scavenging each cylinder evenly for more usable torque, lower underhood heat, and sharper throttle response.

MLS Gaskets and Grade 8 Hardware Seal the Leak for Good

Each upgrade carries multi-layer steel exhaust gaskets and Grade 8 header bolts sized to the HEMI, eliminating the loose, leaking, broken-bolt condition that sends factory manifolds back to the shop over and over.

Shop 5.7 HEMI Exhaust Manifold by Dodge Ram Engine & Fitment Guide

• Long Tube Exhaust Manifold Headers - Fits the 5.7L HEMI V8 in the Dodge Ram 1500 (2009-2018). Full long-tube T304 stainless design with mandrel-bent primaries for maximum scavenging and horsepower on the Eagle HEMI generation.
• Exhaust Manifold Headers - Fits the 5.7L HEMI V8 in the Dodge Ram 1500 (2009-2018). Direct-fit shorty style stainless headers that clear the factory heat shields and stop the broken bolt and warping issues.
• Exhaust Manifold Headers, 1-5/8 in Primary - Fits the 5.7L HEMI V8 in the Dodge Ram 1500 (2009-2018). Larger 1-5/8-inch primaries for trucks running towing, gears, or a tune that want better top-end flow.
• Exhaust Manifold Headers for 5.2L and 5.9L - Fits the 5.2L Magnum and 5.9L Magnum V8 and V10 in the Dodge Ram 1500, 2500, and 3500 Pickup (1992-2004). Stainless tubular upgrade for the pre-HEMI Magnum generation trucks.

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What are the symptoms of a cracked or leaking 5.7 HEMI exhaust manifold?

The first sign is usually a ticking or tapping noise from the front of the engine on cold startup, the classic HEMI tick, that may quiet down as the manifold heats up and expands.
You may also smell exhaust in the cabin or engine bay, see black soot around the mounting ports, or pull a lean oxygen sensor or check engine code.
A loud, steady tick that never goes away usually means a bolt has snapped and the manifold is leaking permanently.

Why do 5.7 HEMI exhaust manifold bolts keep breaking?

The aluminum cylinder head and the cast iron manifold expand and contract at different rates through every heat cycle, so the factory bolts flex and fatigue until they snap.
The bolts are undersized for the load, they corrode at the head where dissimilar metals meet, and the front and driver side run hottest so they fail first.
Once one bolt lets go the manifold warps, the clamp load drops, and the rest follow.

What years of Ram 5.7 HEMI have the exhaust manifold bolt problem?

The broken bolt issue is most reported on the 2009 through 2022 Eagle generation 5.7L HEMI in the Ram 1500 and Ram 2500, but the same cast iron manifold design appears across the early 2003 to 2008 HEMI and the 2019 to 2024 DT generation trucks.
If your 5.7 HEMI has factory cast manifolds, the thermal cycle failure applies regardless of year.
The upgraded stainless headers in this collection are the repeatable fix for all of them.

Is there a recall for the 2012 Dodge Ram 5.7 HEMI exhaust manifold?

There is no official safety recall for 5.7 HEMI exhaust manifold bolts on the 2012 Ram, only Technical Service Bulletins documenting the known leak and tick condition.
Some owners had the repair covered under the 5 year or 100,000 mile powertrain warranty while it was active, but a 2012 is well past that window today.
Upgraded stainless manifolds and fresh MLS gaskets are the durable alternative to repeated dealer bolt swaps.

How much horsepower do headers add to a 5.7 HEMI?

Quality long-tube headers typically add 20 to 35 wheel horsepower on a 5.7L HEMI, with shorty style headers in the 8 to 12 whp range depending on the rest of your setup.
You also gain torque in the towing rpm band, sharper throttle response, and lower underhood heat from the improved flow.
The exact number moves with your intake, tune, and exhaust, but the seat of the pants difference is immediate.

Should I replace my manifold with stock cast or upgrade to headers?

Swapping another factory cast iron manifold back in just resets the clock on the same warping and broken bolt failure, because the root cause never changed.
A stainless steel header or tubular manifold with thick CNC flanges, MLS gaskets, and Grade 8 hardware addresses the actual thermal and clamping problem instead of hiding it.
For a truck you plan to keep, the upgrade is the cheaper answer over time.

Are stainless steel headers better than factory cast iron manifolds?

Yes. T304 stainless tubing resists the rust and thermal cracking that kills factory castings, and the tubular design flows far better than the restrictive OEM log.
Mandrel-bent primaries and merged collectors scavenge the cylinders evenly, while thick machined flanges hold the gasket flat across heat cycles.
You get durability and performance in the same part instead of choosing between them.

Will these manifolds fit a 2003-2008 or 2019-2020 Ram 1500?

The headers stocked in this collection are engineered for the 2009 to 2018 Dodge Ram 1500 5.7L HEMI and the 1992 to 2004 Dodge Ram 5.2L and 5.9L Magnum, so confirm your generation before ordering.
Fitment changes between the early HEMI, the 2009 to 2018 Eagle, and the 2019 and newer DT trucks because port spacing and steering clearance differ.
Our 24/7 live tech support will confirm the correct manifold for your exact year and cab before you buy.

Do I need new gaskets and hardware with the manifold upgrade?

Always install fresh multi-layer steel exhaust gaskets and new Grade 8 header bolts when you change the manifold, because reusing stretched, rusted factory hardware reintroduces the leak you just fixed.
Most kits include the MLS gaskets and hardware, and you can reuse or upgrade the factory heat shield depending on the header style.
This is also the right time to inspect the oxygen sensors and the steering shaft clearance on the driver side.

Is a 5.7 HEMI exhaust manifold or header upgrade legal for street use?

Manifold and header upgrades are intended for competition and closed-course off-road use only in jurisdictions that restrict exhaust and emissions modifications, so check your local and state laws before installing on a registered street vehicle.
Always confirm the exact fitment for your model year, as installing the wrong generation manifold will not seal and can damage the gasket surface.
Every order ships free with fast delivery, is backed by our 1-year warranty, and is covered by a 45-day return policy so you can buy with confidence.