Do you ever feel like your Chrysler 300C is holding back its true potential? The 5.7L Hemi engine is a beast, but the restrictive factory exhaust manifolds act like a chokehold on your horsepower. Unleashing that hidden roar and performance starts with a simple upgrade: long tube headers.
However, picking the right set can feel like a nightmare. You have to worry about fitment issues, emission laws, and confusing material choices. Many owners waste time and money on headers that do not fit correctly or fail to provide the promised power gains. It is easy to get overwhelmed by the endless options on the market today.
This guide will clear the confusion. We will break down exactly what you need to look for, from primary pipe diameter to high-flow catalytic converters. You will learn how to choose the perfect setup that boosts your throttle response and gives your car that deep, aggressive Hemi rumble you crave.
Stop settling for stock performance and start building the machine you deserve. Let’s dive into the world of long tube headers and find the best match for your Chrysler 300C.
Top Long Tube Headers For 5.7 Hemi Chrysler 300C Recommendations
- Designed by Certified Automotive Experts, these Black Thermal Barrier Coated long tube headers feature 1-5/8" primaries and 2-1/2" collectors, optimizing exhaust flow.
- Durable Construction: Built with fully mandrel-bent 16-gauge steel tubes, these headers provide consistent strength and smooth airflow.
- PRECISION FITMENT: CNC laser-cut 5/16” thick flanges are designed specifically for 1988–1998 Chevy and GMC K1500 and K2500 4WD trucks equipped with 5.0L and 5.7L small block V8 engines. These headers also fit select 1999–2000 Classic (carryover body style) trucks but will not fit 1999 and newer GMT800 new body style models.
- Superior Craftsmanship: TIG-welded joints reinforce strength, prevent cracking, and improve wear resistance even under high temperatures. Certified Automotive Experts ensures each header meets strict quality standards, making them ideal for both enthusiasts and daily drivers.
- Fitment Notes: These headers are designed for GM OBS trucks, but like headers, they are not always direct bolt-on. Minor modification may be needed.
- DIRECT FITMENT CLARITY: Direct replacement for 2009-2018 Ram 1500 5.7L Hemi and 2019-2024 Ram 1500 Classic 5.7L old body style trucks. Not compatible with 2019+ new body Ram 1500 models. Fits both 2WD and 4WD configurations.
- REPLACES FAILURE PRONE MANIFOLDS: Engineered stainless alternative to factory cast exhaust manifolds that commonly crack or break bolts. Designed to eliminate ticking and leak issues associated with worn stock manifolds.
- TRUE DIRECT BOLT ON DESIGN: Bolts directly to factory cylinder heads and connects to the OEM catalytic converter location. Retains original emissions equipment configuration without cutting or fabrication.
- 304 STAINLESS CONSTRUCTION: Built from polished 304 stainless steel with thick laser-cut flanges and mandrel-bent tubing for strength, corrosion resistance, and durability through repeated heat cycles.
- COMPLETE INSTALLATION KIT: Includes steel-clad fiber manifold gaskets and installation hardware for a complete manifold replacement solution.
- Multi Layer Stainless Steel Header Gasket - Chrysler 6.1L/6.2L/6.4L & 2009
- 5.7L Hemi Engines - Gaskets Are Included In Most Header Kits. This Part Number Should Only Be Ordered As An Upgrade, Or Replacment For Damaged Or Lost Gaskets.
- Fitment: This intake & exhaust pushrod set is fit for Chrysler Dodge Jeep Ram 5.7L 6.4L V8 HEMI Engine 2009-2019.
- Replace Part Numbers: 05045516AA, 53021557BB, 050455155AA, 53021556BB, PR667, PR668.
- Function: Ensures smooth valve operation, optimizes intake/exhaust efficiency, enhances engine power delivery, and reduces friction for reliable long-term performance.
- Material: Intake and exhaust actuator set is made of high quality material, sturdy and durable, practical and long service life.
- Package Includes: 8 x Int. Push Rods(6.792" ); 8 x Exh. Push Rods(8.085"). Please verify compatibility with your vehicle model before completing the purchase.
- Complete Upgrade Kit – Includes multi-layer steel (MLS) gaskets and header bolts for a superior seal, reduced leaks, and faster installation compared to standard fiber gasket kits.
- Proven Fitment – Designed for LS swap applications in 1973–1987 Chevy/GMC C/K10–30 2WD & 4WD pickups and 1988–1991 square-body C3500/K3500, Blazer, Jimmy, and Suburban models. (Not for 1988–1998 OBS/GMT400 or 2014+ Gen-V LT engines.)
- High-Performance Flow Design – Long-tube configuration with 1-3/4” mandrel-bent primaries and 3” merge collectors increases exhaust scavenging, torque, and horsepower across the powerband.
- Heavy-Duty Construction – Built from thick-wall steel tubing with CNC-machined 3/8” flanges and precision TIG-welded joints to prevent warping, leaks, and early failure.
- Thermal Barrier Coating – Black aluminized finish resists corrosion and acts as a true heat shield, lowering under-hood temperatures while providing a clean, stealth appearance.
- Full length pipe layout for power gain at mid to high RPM
- Fully mandrel bent tubes made of 16-gauge (1.5mm thickness) cold roll flash mild steel
- Head flange laser-cut from 5/16-inch (8.0mm) steel plates and flattened by hydraulic press
- All joints TIG welded for great resistance against cracking and wearing
- Hi-temp paint that holds up to 500C or 932F
- These C10 LS Swap Truck Long Tube Headers have 1 7/8" Primary Tubes ,3" Outlet
- These C10 LS Swap Truck Long Tube Headers not fit 4wd, only for LS series engine swaps
- These C10 LS Swap Truck Long Tube Headers works with C10 LS ,LS1, LS2, LS3, LS6 , 4.8L, 5.3L, 5.7L, 6.0L, 6.2L V8 Engines
- These C10 LS Swap Truck Long Tube Headers not work on standard SBC or BBC engine
- These C10 LS Swap Truck Long Tube Headers for Chevy II/Nova 1969- 1977 These C10 LS Swap Truck Long Tube Headers for Chevy Chevelle 1964- 1973 These C10 LS Swap Truck Long Tube Headers for Chevy Caprice 1966-1992
Unleashing Power: The Ultimate Guide to Long Tube Headers for 5.7L Hemi Chrysler 300C
The 5.7L Hemi engine in your Chrysler 300C is a beast. However, the factory exhaust manifolds often hold it back. Long tube headers are the best upgrade to unlock hidden horsepower and torque. These parts help your engine breathe better by moving exhaust gases out faster. If you want a deeper sound and more punchy acceleration, this guide will help you choose the right set.
Key Features to Look For
- Primary Tube Diameter: Most 5.7L Hemi engines perform best with 1.75-inch or 1.875-inch primaries. Smaller tubes help low-end torque, while larger ones help high-end power.
- Collector Design: Look for “merge collectors.” These smooth out the airflow where the tubes join together.
- Flange Thickness: Thick flanges prevent warping and leaks. Aim for at least 3/8-inch thick steel.
- Bolt-on Fitment: Make sure the headers are designed specifically for the 300C chassis to avoid clearance issues with the steering shaft.
The Best Materials
Material choice matters for durability. 304 Stainless Steel is the gold standard. It resists rust and stands up to high heat. Some cheaper headers use mild steel. These are painted or ceramic-coated. They cost less but will eventually rust. If you live in a rainy or snowy area, stainless steel is a must.
Factors Affecting Quality
What Improves Quality?
High-quality headers feature CNC-mandrel bends. These bends keep the tube diameter consistent throughout the curve. Smooth welds inside the tubes also improve flow. Ceramic coating is another great upgrade. It keeps engine heat inside the pipes and lowers the temperature under your hood.
What Reduces Quality?
Poor welds cause turbulence and exhaust leaks. Thin-wall tubing can crack over time from engine vibration. Also, if the header flange is not flat, you will fight constant exhaust leaks at the cylinder head.
User Experience and Use Cases
Installing long tube headers changes the personality of your 300C. You will notice a louder, more aggressive exhaust note immediately. Most drivers feel a boost in throttle response. Note that these headers often require a custom ECU tune to run correctly. They are perfect for street cruisers, weekend racers, and anyone who loves the classic Hemi rumble.
10 Frequently Asked Questions
Q: Will long tube headers pass emissions testing?
A: In many states, no. Long tube headers remove the factory catalytic converters. Always check your local laws before buying.
Q: Do I need a tune after installation?
A: Yes. Your engine will run too lean without a tune. A professional tune adjusts the fuel and air mix for the new airflow.
Q: Is the installation difficult?
A: It is a challenging job. You have to work in tight spaces. Many owners choose to have a professional shop install them.
Q: Do they cause a “Check Engine” light?
A: Yes, because they change the readings of your oxygen sensors. A custom tune usually turns these lights off.
Q: Will I get more gas mileage?
A: Probably not. Most people drive harder once they hear the new exhaust sound.
Q: Do I need new gaskets?
A: Always use high-quality, brand-new gaskets during installation to prevent leaks.
Q: Can I keep my stock exhaust system?
A: Usually, you need a “mid-pipe” kit to connect the headers to your existing exhaust.
Q: Do ceramic coatings really help?
A: Yes. They reduce under-hood heat and protect the metal from corrosion.
Q: Will these headers hit the floorboards?
A: High-quality headers are designed to clear the frame. Cheap, poorly made headers may hit the floor or steering rack.
Q: How much horsepower will I gain?
A: Most 5.7L Hemi owners see gains of 15 to 30 horsepower depending on the tune and other modifications.