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Active Autowerke Catted Downpipes BMW F90 M5 / M8

SKU: 11-063
Price
$2,999.00
Currently Backordered - You can still place your order and we'll ship your order as soon as the product is back in stock!

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Installation Services

Don’t worry about the hassle — let our expert team at Forza Motorworks handle the installation for you. Our professional installation ensures everything fits and operates exactly as intended, giving you clean, factory-quality results, proper wiring or mounting, and avoiding the risks of DIY mistakes. You’ll save time, avoid frustration, and get peace of mind knowing the job is done right the first time. Contact us to learn about our installation services and enjoy a seamless upgrade from day one.

FAQ

Shipping Information
For items that are in stock, purchases made after 9am EST will be usually be shipped out in the next 1-2 business days. Please inquire to confirm lead times if you have specific time constraints. Orders will be sent via signature required at our discretion unless otherwise requested.

International Shipping
Any and all customs duties, taxes, import fees, and/or tariffs assessed in connection with the purchase shall be the sole responsibility of the customer/end user.

Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. All returns are subject to a restocking fee based on item and package condition. Buyer is responsible for paying for return shipping costs. If you need a return label, we will email you a return label and deduct cost from refund. Original shipping costs are not refundable. Special order items are not eligible for return.

Cancellation Policy
In order to cancel your order you must email within 24 hours of placing your order or before your order has shipped, whichever occurs first. Special order items are not eligible for cancelation.

Exchange Policy
We have a 30-day exchange policy, which means you have 30 days after receiving your item to request an exchange. To be eligible for an exchange, your item must be brand new in box. Buyer is responsible for paying all shipping costs to exchange product.

Product Description

The Active Autowerke Catted Downpipes for the BMW F90 M5, F9X M8, X5M, and X6M are a high-flow exhaust upgrade engineered to unlock more power and responsiveness from your S63TU twin-turbo engine. These downpipes dramatically reduce the restrictive characteristics of the factory units, promoting quicker turbo spool, improved throttle response, and increased horsepower and torque throughout the RPM range — all while retaining emissions capability and minimizing check-engine-light issues when used with the included high-flow catalysts. Built from premium materials with precision fitment, this upgrade is ideal for enthusiasts who want measurable performance gains and a more engaging driving experience.

Fitment Notes

  • Designed specifically for BMW F90 M5 (2018+) and BMW F9X M8 (2019+).

  • Also fits BMW X5M (F95) and BMW X6M (F96) applications when equipped with the S63TU engine.

  • Direct bolt-on downpipe replacement — no cutting, welding, or fabrication required.

  • Accepts OEM O2 sensor heat shields to retain a stock-like engine bay appearance.

  • Includes high-flow catalytic converters designed to avoid CEL and maintain OBD2 compliance in most regions (excluding California).

  • Not legal in California or other CARB-regulated states due to emissions equipment requirements.

Included

  • Pair of high-flow catted downpipes specifically engineered for S63TU engines.

  • GESI Ultra High Output catalytic converters (4.5″) to maintain emissions functionality and help prevent a check-engine light.

  • OEM-compatible mounting flanges, gaskets, and hardware for a complete install.

  • Installation instructions for straightforward bolt-on fitment.

Product Specs

  • Piping Diameter: 4.50″ high-flow mandrel-bent construction for improved exhaust velocity.

  • Material: TIG-welded 304 stainless steel for corrosion resistance and long-term durability.

  • Catalyst Type: GESI Ultra High Output 400 CPSI catalysts, EPA registered and 49-state compliant.

  • Fitment: Direct bolt-on downpipe replacement with factory-matched 3.5″ V-band connections.

  • Power Handling: Rated for applications up to 500–850 hp, suitable for stock and tuned engines.

  • Temperature Tolerance: Withstands exhaust gas temperatures up to 1500 °F.

  • Compliance: OBD2 compliant for no CEL in most states; not CARB approved in California.

  • Warranty: Typically includes a 5-year/50,000-mile warranty on housing and a 2-year/25,000-mile warranty on catalytic core (varies by retailer).

Product Features

  • High-flow catalytic converters help maintain emissions compliance without triggering a check-engine light in most OBD2 vehicles.

  • Significantly reduced turbo lag and quicker turbo spool thanks to free-flowing downpipe design.

  • Improved horsepower and torque across the powerband by eliminating restrictive stock sections.

  • 304 stainless steel construction with TIG welding ensures durability and resistance to high temperatures.

  • Direct bolt-on fitment with OEM-matched V-bands and heat-shield compatibility for simpler installation and stock aesthetics.

  • EPA registered and OBD2 compliant in 49 states (excludes California) for broad legality outside CARB jurisdictions.