Exhaust Headers for 1997-1999 Jeep Wrangler TJ 2.5L L4
Enhance the performance of your 1997-1999 Jeep Wrangler TJ with Flashark Exhaust Headers. Designed specifically for this model, these headers provide significant gains in both horsepower and torque, improving your vehicle's overall power output and acceleration. Whether you're off-roading or cruising the streets, experience enhanced engine efficiency, a more aggressive exhaust sound, and up to 5-10 horsepower gains.
Specifications:
Brand Name: FLASHARK
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: Stainless Steel
Surface: Mirror Polish
Model: EH28268
1.75" Inlet
2"-3" Outlet
Head Flange Thickness: 7/16"
Outlet Flange Thickness: 3/8"
HP/Torque Gains of 5-10
Details
- 100% Brand new, never been used.
- Made of high-quality T-304 stainless steel.
- TIG welded CNC machine flange.
- Polished finish surface.
- Direct bolt-on, no modification needed.
- High-quality aftermarket parts.
- Professional workmanship.
- Strict quality control during the process.
- Item the same as picture shown.
- All necessary hardware, bolts, and gaskets
Features
- Perfect Fitment: 1997-1999 Jeep Wrangler TJ 2.5L L4
- Great Material: These sliders are made of high-strength and durable Stainless steel material.About 12 pounds off your bike.
- Easy Installation: The item can be fitted easily. Power up to approx 5HP ~ 6HP, and make your bike more power.
- Good Package: The package included 1 x Exhaust mid pipe and 2 x Stainless clamps. You can drive your motorbike without worries.
What does an exhaust header do?
Boost Horsepower, Torque, and Fuel Efficiency with Flashark Exhaust Headers
Upgrading your Jeep Wrangler TJ with FLASHARK Exhaust Headers is an excellent way to boost both horsepower and torque, improving overall engine performance. By replacing the factory exhaust manifold with high-performance headers, you reduce back pressure and enhance exhaust flow, allowing your engine to breathe easier. This results in improved combustion, quicker acceleration, and better power delivery. In fact, installing FLASHARK Exhaust Headers can add up to 5-10 horsepower and increased torque.
Not only will you feel the difference in performance, but you’ll also notice a more aggressive exhaust sound, giving your Jeep that signature muscle car roar.
Purchase instructions
Professional installation is highly recommended, exhaust systems are not always perfect, and while most of the time these exhaust systems work perfectly together, occasionally a slight modification to the exhaust system is required to achieve a perfect fit.
Exhaust Header VS Manifold, which is the better choice?
The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold.
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1997-1999 Jeep Wrangler TJ 2.5L L4
Q1: Does this exhaust header specifically fit the 1997-1999 Jeep Wrangler TJ 2.5L L4?
A1: Yes, this Flashark exhaust header is strictly engineered as a direct replacement for the 1997, 1998, and 1999 Jeep Wrangler TJ equipped with the 2.5L 4-cylinder (L4) engine. It ensures proper alignment and direct fitment for this specific generation.
Q2: What performance gains can I expect from upgrading my Jeep TJ 2.5L header?
A2: By replacing your restrictive factory cast-iron manifold with our high-flow T-304 stainless steel header, you significantly reduce exhaust back pressure. Most drivers experience a proven power gain of 5 to 10 horsepower, alongside increased low-end torque which is perfect for trail off-roading.
Q3: Is the installation difficult, and do I need to cut or weld anything?
A3: This header features a direct bolt-on design, meaning absolutely no cutting, welding, or custom fabrication is required. However, because clearances on the 2.5L engine are naturally tight near the intake manifold, professional installation is highly recommended to guarantee a perfect seal.
Q4: What materials are used to construct this Jeep Wrangler TJ exhaust manifold upgrade?
A4: For maximum durability and heat dissipation, this performance header is fabricated from premium T-304 stainless steel and features CNC-machined, TIG-welded flanges. This completely eliminates the cracking, warping, and rusting issues notoriously associated with stock iron manifolds.
Q5: Will this aftermarket header change the exhaust sound of my Jeep Wrangler?
A5: Absolutely! The high-flow tubular design allows your 2.5L engine to breathe much easier, instantly transforming your exhaust note. It eliminates the choked factory sound, delivering a deeper, more aggressive, and robust tone that perfectly matches your Jeep's rugged aesthetic.
Q6: Are the gaskets and mounting hardware included with this header?
A6: Yes, the package includes the exhaust mid-pipe, stainless clamps, and basic hardware. However, mechanic pro-tip: because the 2.5L TJ engine shares a single gasket for both the intake and exhaust manifolds, we strongly recommend purchasing a brand-new, high-quality OEM-style combination gasket for the most reliable, leak-proof installation.
Q7: Will the new header interfere with the mounting of my factory intake manifold?
A7: Due to the performance-oriented tubular design, clearance around the #1 and #4 tubes near the intake manifold is tighter than the stock cast block. You may need to utilize standard mechanical adjustments—such as adding washers to the mounting brackets—to ensure both the intake and exhaust manifolds sit perfectly flush.
Q8: Will installing this exhaust header trigger a Check Engine Light (CEL)?
A8: No. When installed correctly without any vacuum or exhaust leaks, this direct-fit header will not trigger a Check Engine Light. It operates seamlessly with your Jeep’s factory O2 sensors and emissions parameters.
Q9: Why is a stainless steel header better than replacing my cracked cast-iron manifold with another stock unit?
A9: Stock iron manifolds are heavy, heat-soak easily, and are extremely prone to cracking from thermal cycling over time. Our stainless steel tubular header is lighter, drastically outperforms cast iron in exhaust scavenging, and serves as a permanent, high-performance solution.
Q10: What are the exact structural dimensions of this 2.5L Jeep TJ exhaust header?
A10: This header is designed with a 1.75-inch inlet and a smooth 2-to-3-inch outlet. Combined with a robust 7/16-inch head flange and a 3/8-inch outlet flange, the enlarged, smooth-bent piping prevents exhaust turbulence and aggressively pulls exhaust gases away from the cylinders.
Q11: Can I use this header on a 4.0L 6-cylinder Jeep Wrangler?
A11: No. This specific header (SKU: FLES08221) is strictly designed for the 2.5L 4-cylinder (L4) engine. If you drive a 4.0L inline-6 Jeep, you will need to purchase our 4.0L-specific header model to ensure proper fitment.
Q12: Is this a practical modification for both daily driving and off-roading?
A12: Yes! It is one of the best bolt-on upgrades for the 2.5L TJ platform. The added low-end torque provides the grunt you need for crawling over rocks on the trail, while the horsepower bump makes highway merging and daily driving significantly smoother.