OKTAN
BMW N20 / N26 Downpipe
$369.00
Made to order — ships in 10–14 days
Fits your vehicle
Check fitment
Lower driver-side corner of the windscreen, the sticker in the driver’s door jamb, or your registration / insurance card. It’s 17 characters — we decode it instantly and never store it.
- Custom-made to order — ships in 10–14 days
- Free tracked shipping across the USA
- Secure payment
- Fitment guarantee — we confirm before you buy
Catless vs 200-cell — which configuration?
| Catless | 200-Cell High-Flow | |
|---|---|---|
| Airflow | Maximum | Excellent |
| Sound | Loudest, most aggressive | Aggressive, less raspy |
| Check-engine light | Needs a tune to clear | Usually code-free on a tune |
| Street & emissions | Off-road / competition only | Far more street-friendly |
| Best for | Track & max-power builds | Daily drivers wanting more |
Emissions & off-road notice. Catless configurations are sold for closed-course competition and off-road use only and are not legal for street use on pollution-controlled vehicles. You are responsible for compliance with the emissions laws where you drive. Prefer a street-friendly setup? Choose a 200-cell high-flow configuration above.
One N20 / N26 downpipe that fits them all. A direct bolt-on flow upgrade for the BMW N20 and its SULEV N26 sibling, TIG-welded from mandrel-bent 3.0" T304 stainless and test-fitted in-house. Wakes up the 2.0L turbo four with faster spool, a stronger note and the headroom your tune needs.
Fitment — BMW N20 / N26 2.0T (2012–2016)
| Chassis | Models |
|---|---|
| F22 / F23 | 220i, 228i |
| F30 / F31 / F34 | 320i, 328i |
| F32 / F33 / F36 | 420i, 428i |
Also fits other rear-wheel-drive N20 / N26 applications. N26 is the emissions (SULEV) version of the N20 — the same downpipe fits both. Bolts to the OEM mounting points. Not for the N51 / N52 128i. We confirm fitment for your exact car before it ships.
Why owners choose OKTAN
- Faster spool & sharper throttle — less back-pressure, earlier boost.
- Deeper tone with no cabin drone at cruise.
- Unlocks your tune beyond the restrictive OEM catalyst.
- True bolt-on — no cutting or welding.
Specifications
- Material: T304 stainless steel
- Piping: 3.0" mandrel-bent, back-purged TIG welds
- Flange: CNC-machined V-band
- Flex section: braided stainless
- Configuration: catless (base) or 200-cell high-flow — choose above
- Sensors: OEM O2 sensor positions retained
- Warranty: lifetime against manufacturing defects
Made to order, free tracked US shipping, dispatched in 10–14 days.
T304 StainlessAerospace-grade steel — never budget mild steel
True Bolt-OnFits the OEM mid-pipe — no cutting or welding
Flow-TestedEngineered & test-fitted in-house on real cars
Lifetime WarrantyCovered against manufacturing defects
Install at a glance
IntermediateDIY difficulty
2–4 hoursTypical time
Basic hand toolsSocket set & ratchet
Ramps or liftRaise & support safely
- Let the exhaust cool fully, then raise and support the car on stands or ramps.
- Soak the fasteners and O2 sensors with penetrating oil before removal.
- Transfer your O2 sensors to the new pipe — OEM sensor positions are retained.
- Seat the flange and tighten the V-band clamp evenly, then torque to spec.
- Running catless? Pair it with a supporting tune to manage fuel trims and the CEL.
- Every order is fitment-confirmed before it ships — stuck? We’ll walk you through it.
Complete the install
Customer reviews
4.8
/ 5
Verified purchase
Woke up my 328i more than I expected — spools quicker and sounds great. Bolted right up.
Verified purchase
Clean welds, perfect fit on my N20. No check engine light with the tune.
Verified purchase
Good quality for the price. Install took a couple hours with the hardware kit.