Overview
KSP Exhaust Pipes enhance your BMW's engine performance and sound. By installing KSP Performance's Exhaust Header, you'll experience increased horsepower and a superior exhaust note. It's user-friendly and convenient with a direct bolt-on design requiring no modifications.
| Years | Make | Engine |
|---|---|---|
| 1998–2006 (2006 coupe only) | BMW E46 | 323 / 328 |
| 2001–2003 | BMW E39 5 Series | 2.5L / 2.8L / 3.0L |
Does not fit BMW 325 or 330 models (marked as “Too Long”)
Exception fits: 2001 BMW 325i
Exception fits: 2003 BMW 330Ci Base Coupe 2-Door 3.0L
Exception fits: 2004 BMW 325i Base Wagon 4-Door 2.5L
Does not fit 2002 BMW 325Ci
Does not fit 2002 BMW 330Ci
| Material | Stainless Steel |
| Surface | Mirror Polish |
| Outlet Size | 2" |
| Primary Tube Size | 1.75" |
| Number of O2 Sensor Locations | 2 |
| Head Flange Thickness | 7/16" |
| Outlet Flange Thickness | 3/8" |
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Designed with F1-style merge collectors to reduce turbulence and increase horsepower and torque
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TIG-welded with back-purged welds for strength and durability on both inner and outer surfaces
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Equipped with four O2 (lambda) sensor ports, same as the factory downpipe configuration
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Does not include catalytic converters; not legal for use on public roads, check local regulations
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Provides around 12 HP increase; with ECU tuning upgrades, gains can exceed 30 HP
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Equal-length headers with smooth mandrel bends and large collectors maximize exhaust flow
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Improves acceleration across the full RPM range with minimal additional noise
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Professional Installation is Highly Recommended
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Installation Instruction is not Included
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CA Residents WARNING: Cancer and Reproductive Harm - [www.P65Warnings.ca.gov](http://www.p65warnings.ca.gov/)
Q: DO I NEED TO WELD ANYTHING TO INSTALL THIS EXHAUST HEADER?
A: No, the KSP exhaust header is designed for direct bolt-on installation, meaning no welding or modifications are required, as long as your vehicle meets the fitment criteria.
Q: IS THIS EXHAUST HEADER STREET LEGAL?
A: This exhaust header is designed for off-road use only and may not pass a smog check in certain states, including California.
Q: HOW MANY EXHAUST HEADERS WILL I RECEIVE?
A: Our Exhaust Headers are sold in sets of two.
- Getting more air in and exhaust out is key to engine performance. Exhaust headers are the first step, replacing the restrictive factory manifold to improve airflow.
- Each cylinder gets its own mini exhaust pipe, reducing back pressure and preventing interference. With smoother flow, the engine delivers more power. Paired with a cold air intake and cat-back exhaust, headers help the engine perform at its full potential.
