Flashark Exhaust Headers for BMW 1998-2006 E46 323i 328i & 1997-2000 E39 5 Series – M52 Engine
Upgrade your BMW’s exhaust system with Flashark Exhaust Headers, designed specifically for BMW's M52 engine family (including M52B25 and M52B28). Whether you are looking for the best e46 headers for your 1998-2006 3 Series or high-flowing e39 headers for your 1997-2000 5 Series (2.5L/2.8L/3.0L), these high-performance components are engineered to enhance your engine's output. By improving exhaust flow, they significantly boost horsepower and torque, giving your BMW a noticeable increase in performance. Constructed from durable T304 stainless steel, they offer a straightforward, bolt-on installation for both track and street enthusiasts.
Specifications:
Brand Name: FLASHARK
SKU: ES08335 (EH28535)
Certificate: ISO9001:2000
Material: T304 Stainless Steel
Surface: Mirror Polish
The E46 & E39 headers feature a lightweight 6-2-1 piping design and are made from premium T304 stainless steel, ensuring long-lasting durability and peak performance.
Features:
- Improved TIG welding with each weld back purged so each weld is protected on both the front and rear sides
- Includes 4 O2 (lambda) sensor ports just like the original down pipe configuration, does not include catalytic converters - not useable on the public roads! Check your local regulations
- Improvement is approximately 12 hp. With our ECU tuning software upgrades, we have seen increases of over 30 HP
- The design utilizes equal-length headers, smooth mandrel bends and large F1-style collectors
- Headers make the car noticeably faster across the rpm range with minimal additional noise
- Straight forward installation
Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, premium e46 headers or e39 headers provide more horsepower and improved exhaust resonance. Flashark offers direct bolt-on, no modification needed.
Quality assurance:
1. Each item has been factory tested and meets or exceeds OEM specifications.
2. If you are not satisfied with the product or the product has quality problems, you can contact us at any time, we will provide you with a satisfactory answer and solve the after-sales problem for you.
Package Includes:
- 2*Exhaust Manifolds
- 4*Gaskets
Exhaust Header vs. Manifold: Which is the Better Choice for Your BMW E46 or E39?
When upgrading the exhaust system on your 3 Series or 5 Series, choosing between a performance header and a factory manifold is essential. The key differences lie in the materials and design. Flashark's premium e46 headers and e39 headers are made from lightweight T304 stainless steel, while the traditional stock exhaust manifolds found on these chassis are typically crafted from thick, heavy, and restrictive cast iron. Additionally, our performance headers utilize longer piping than stock manifolds, providing vastly improved exhaust flow.
Factory exhaust manifolds on the E46 and E39 tend to create significant back pressure, which limits your BMW's true potential. In contrast, our upgraded headers feature optimized individual tubes for each cylinder, effectively eliminating this bottleneck. This design allows exhaust gases to flow freely, significantly enhancing both horsepower and torque, while waking up that classic straight-six sound. For optimal efficiency and track-ready performance, a dedicated set of headers is the clear winner over traditional cast manifolds.
Fitment & Compatibility
| Brand | Model | Year Range | Full Compatible Specs |
|---|---|---|---|
| BMW | 323i / 328i | 1998-2006 | 3 Series, E46 Chassis, 2.5L/2.8L/3.0L inline-6 Engine |
| BMW | 5 Series | 1997-2000 | E39 Chassis, 2.5L/2.8L/3.0L inline-6 Engine |
- Non-E46/E39 chassis models
- Non-2.5L/2.8L/3.0L inline-6 engine configurations
- E46 3 Series: Non-323i/328i trims
- M3/M5 performance variants, diesel engine models
Frequently Asked Questions
Q1: Will installing these e46 headers throw a Check Engine Light (CEL)?
A1: Yes. Because these high-performance headers remove the restrictive factory catalytic converters, your downstream O2 sensors will detect an increase in exhaust flow. To prevent the CEL, you will need to install O2 sensor spacers (defoulers) or, ideally, get an ECU tune to optimize your engine for the new setup.
Q2: Do these headers fit both Left-Hand Drive (LHD) and Right-Hand Drive (RHD) BMWs?
A2: These headers are strictly designed for Left-Hand Drive (LHD) models. Due to the tight clearance around the steering column on the E46 and E39 chassis, they will not fit RHD (Right-Hand Drive) vehicles without heavy modification.
Q3: How difficult is the installation? Can I do it in my garage?
A3: We rate this as an "Advanced" installation. While these e46 headers and e39 headers are a direct bolt-on replacement with no welding required, the inline-6 engine bay is notoriously tight. Accessing the manifold nuts takes patience. Expect 4-6 hours of labor, and we highly recommend professional installation by a specialized European auto shop.
Q4: Do I need an ECU tune after installing these headers?
A4: While your BMW will run and drive safely without a tune, we highly recommend getting an ECU remap. A proper tune will adjust the air/fuel ratio to take full advantage of the increased exhaust flow, potentially unlocking upwards of 20-30 total horsepower and eliminating any flat spots in the powerband.
Q5: Will these catless headers make my exhaust sound excessively raspy?
A5: Removing the factory cast-iron manifolds will significantly increase exhaust volume and unlock that classic aggressive straight-six howl. However, to prevent the infamous "M52 rasp" between 2500-3000 RPM, we highly suggest pairing these headers with a quality aftermarket mid-pipe or a vibrant resonator.
Q6: Should I reuse my original factory exhaust studs and nuts?
A6: Absolutely NOT. Your factory studs have endured two decades of extreme heat cycling and are highly prone to snapping during removal. We strongly advise purchasing a brand new set of OEM copper locking nuts and steel studs before starting the job. (Note: New premium gaskets are already included in our package).
Q7: Will I lose low-end torque by switching to an open header design?
A7: This is a common myth. Our 6-2-1 equal-length piping and smooth mandrel bends are engineered to create an exhaust scavenging effect. Instead of losing power, this design actively helps pull exhaust gases from the cylinder, resulting in a noticeable improvement in mid-range torque alongside the top-end horsepower gains.
Q8: Are there any clearance issues with manual or automatic transmissions?
A8: No. The precise routing of our T304 stainless steel piping is designed to provide ample clearance for both manual and automatic transmission bellhousings on the 3 Series and 5 Series platforms. No hammering or dimpling of the tubes is required.
Q9: Why should I choose T304 stainless steel over standard exhaust piping?
A9: The factory cast-iron manifolds are incredibly heavy and prone to cracking over time. T304 stainless steel offers superior heat dissipation, massive weight reduction, and extreme resistance to rust and corrosion. Combined with our back-purged TIG welds, these headers are built to outlast your vehicle.
Q10: Will my BMW pass smog or emissions testing with these installed?
A10: No. Because these performance headers completely remove the primary catalytic converters, they will not pass visual or sniffer emissions tests. These products are sold strictly for off-road, racing, and track use only. Please check your local and state regulations before purchasing.