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Exhaust› Catalytic Converters

Evolution Racewerks

Sports Series High Flow Catted Downpipe

$895.00 $760.75 Save $134.25

SKU: BM-EXH006SCAT

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Special Order
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Evolution Racewerks Sports Series downpipe is a high-flow, catted component designed for BMW N20 engines. It features a 4-inch diameter, 100% stainless steel construction, and TIG welding. This downpipe includes a high-flow 200-cell metallic catalytic converter, offering increased horsepower and torque. It also incorporates a stainless steel flex section for durability and compatibility with factory or aftermarket exhaust systems. All necessary hardware for installation is included.
Show original supplier description
The Evolution Racewerks Sports Series High Flow Catted Downpipe addresses restrictive factory exhaust bottlenecks in the N20 four-cylinder turbo engine. By utilizing a 200-cell metallic catalytic converter rather than the restrictive 400-cell factory ceramic unit, this downpipe significantly reduces backpressure, resulting in a higher torque curve and faster turbocharger spool times. Built in the USA from 100% 304-grade stainless steel, the unit features 4-inch mandrel-bent piping and precision CNC-machined V-band flanges. Unlike rigid aftermarket alternatives, this design incorporates a stainless steel flex section to prevent stress cracks on the exhaust manifold and turbocharger caused by thermal expansion or ground impact. It is compatible with both factory and aftermarket exhaust systems. Fitment is specific to 2012+ BMW 320i, 328i, 420i, and 428i models equipped with the N20 engine; it does NOT fit the N26 engine. This product is intended for off-road competition use only and is not legal for pollution-controlled vehicles on public highways. It is not for sale, installation, or use on licensed vehicles in California, and all purchases require a signed Vehicle Compliance Waiver. Optional configurations include a high-temperature black thermal coating, an additional wideband O2 sensor bung, and an EGT sensor bung.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandEvolution Racewerks
Part NumberBM-EXH006SCAT
CategoryExhaust
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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