SKU: 40426647721

Active Autowerke Downpipes w/ GESI G-Sport Cat - X5M / X6M / X5 / X6 (S63 / N63)

Sale price$1859.00 Regular price$2065.55
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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Description

Active Autowerke Downpipes w/ GESI G-Sport Cat - X5M / X6M / X5 / X6 (S63 / N63)Active Autowerke is proud to bring you our hand made Signature S63 N63 Downpipes for the twin turbo V8 BMW X5M, X6M, 550i, 650i, X5, X6 models. Please note that G body vehicles with the N63B engine will need a different version of the downpipe if you are buying a downpipe that also fits the F body cars, it will not fit your vehicle Active is always doing R&D to ensure that you get a product with the proper fit. A turbo impeller wheel speed is mostly

Active Autowerke is proud to bring you our hand made Signature S63/N63 Downpipes for the twin-turbo V8 BMW X5M, X6M, 550i, 650i, X5, X6 models. Please note that G-body vehicles with the N63B engine will need a different version of the downpipe - if you are buying a downpipe that also fits the F body cars, it will not fit your vehicle - Active is always doing R&D to ensure that you get a product with the proper fit.

A turbo impeller wheel speed is mostly limited by the exhaust back pressure within the system. If one could eliminate some or most of this exhaust back pressure, the turbo will spool that much faster and effortlessly resulting in quicker engine revs and increased HP. The Active Autowerke Signature down pipes are designed with the intent to maximize power. These down pipes are created with the least amount of restrictions possible by utilizing a full 3" piping throughout with the least amount of bends possible. What you will experience is a faster, more responsive engine because the turbo impeller now has the ability to spool that much faster. The end result is more power. Made from 304 stainless steel the handmade construction process ensures a robust and durable exhaust that will provide trouble free performance with the longevity to match.

This variant includes a pair of 4.5" ultra high flow GESI catalytic converter that will NOT produce a CEL!

The GESi G-Sport Ultra High Output Catalytic Converter features full 304 stainless steel construction, including the substrate. GESi UHO-Series Catalytic Converters are EPA registered and compliant for 49 states and fully OBD2 compliant, perfect for use on 1996 and newer vehicles. GESi proprietary precious metal loading technology ensures greatly reduced emissions, eliminating most "Check Engine Lights". These high flow catalytic converters outperform stock converters and provide a reliable solution to the most common catalytic converter problems.

The GESi UHO-Series Catalytic Converters are rated for engines putting out between 500 and 850 horsepower while maintaining a high flow capacity. The reduced back-pressure from this high flow catalytic converter will allow you to maximize your engines horsepower without the harmful emissions. Say goodbye to Check Engine Lights and failed emissions tests!

Please Note: These catalytic converters are not legal for use on vehicles registered in the state of California as a result of California Vehicle Code Section 27156 and 38391.

NOTE: Federal law prohibits the tampering of an emissions control device. Mobile Source Enforcement Memorandum 1A, allows for aftermarket parts to be used in the repair or replacement of emissions control systems, provided the emissions aren't adversely affected. There is no mention or reference to cell density or converter volume dimension. The GESI catalytic converter will produce emissions that will meet the standards set by the EPA, not CARB.

****PLEASE PROVIDE VIN # TO ASSURE ACCURACY ***

MAY TAKE UP TO 2 WEEKs BEFORE SHIPPING AS THEY ARE CUSTOM MADE IN-HOUSE.

FEATURES:
NO CEL when using this downpipe

GESI EPA registered high flow and fully OBD2 compliant

Casted upper stainless steel V-Band for precise fitment

Full 3 inch diameter piping allows for maximum power output

Quicker turbo spool

Rated for 500 to 850 hp applications

Withstands up to 1500 F

Can reach operational efficiency within 9 seconds of startup

Easily bolts-on no cutting or welding required

Durable construction from TIG welded 304 stainless steel

Precise fitment

Ultra high flow 400 cell per square inch catalyst

EPA compliant for use on OBD2 vehicles (1996 and newer) except in California

304 stainless steel substrate is furnace braised to the mantle for outstanding durability

GESi proprietary precious metal loading technology ensures greatly reduced emissions

Ideal for Forced Induction Applications with no loss of HP

Both passengers and drivers are safe from harmful emissions and noise

Covered by 5 Year / 50,000 Mile Warranty (on catalytic converter)

Made in Miami, Florida

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 40426647721

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4.3 ★★★★★
Based on 19 reviews
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Product Reviews
O
Verified Purchase
O. miller
Carnegie, US
★★★★★ 5
Grill kit for bmw
Very easy to install snapped right in. Perfect . Would highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 18, 2019
M
Verified Purchase
matthew palen
Natrona Heights, US
★★★★★ 1
Buy OEM
Finish is fine but sizing is wrong and these don't fit tight but rattle. About 3/4" movement in all ways, which will lead to scratched paint. If you've got a beater, these are fine but for my clean M3, I'll buy OEM from FCP or Turner.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 15, 2024
B
Verified Purchase
Brown, Dwayne
Lake Worth, US
★★★★★ 5
Great
Convenience
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Reviewed in the United States on August 18, 2020
R
Verified Purchase
Racerboy53
Bozeman, US
★★★★★ 5
Well worth the money!
Easy install, warm and has 3 settings. These are great as I can choose which grips I want yet always have access to warm hands in inclimate weather. I can disconnect and keep them in my dry packs. Easy pray and well worth the money. My grips are 4.125” or just over 10cm and fit perfectly.
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Reviewed in the United States on December 28, 2025
A
Verified Purchase
Alex
Fort Morgan, US
★★★★★ 5
So far they're great!
Just installed but so far so good. The installation was simple but time consuming for me as I had to remove a lot of body panels. They don't seem to have any effect on my grip or when I use the throttle. So far, the lowest setting is more than enough. I use these in conjunction with motorcycle muffs and honestly so far I think it's the perfect combination. My hands are warm and I don't have any added bulk to them. Will update if anything goes wrong or stands out with more use but for now I'd say they're completely worth the money if you're regularly riding in the cold.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 18, 2025

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