SKU: 49024646538

Competition Series Catless Secondary Downpipes 2023+ XM S68 Engine

Sale price$357.75 Regular price$397.50
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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16

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Description

Competition Series Catless Secondary Downpipes 2023+ XM S68 EngineIntroducing our Competition Series Secondary Downpipes for your twin turbo S68 engine! Fits 2023+ XM (G09) Key Features: Made in the USA! Manufactured in house. Now available for the 2023+ BMW G09 XM S68 Engines! Does not set off the Check Engine Light (CEL). Higher Max Horsepower Power Curve Higher Initial Torque Curve. Torque curve hits faster and higher and longer. Better throttle response and faster turbo spool up times. Mandrel Bent 3" piping.

Introducing our Competition Series Secondary Downpipes for your twin turbo S68 engine!  Fits 2023+ XM (G09)

Key Features:

  • Made in the USA!  Manufactured in house.
  • Now available for the 2023+ BMW G09 XM S68 Engines!
  • Does not set off the Check Engine Light (CEL).
  • Higher Max Horsepower Power Curve
  • Higher Initial Torque Curve.  Torque curve hits faster and higher and longer.
  • Better throttle response and faster turbo spool up times.
  • Mandrel Bent 3" piping.  Smooth transition to the exhaust system.
  • 100% Stainless Steel Construction
  • 100% TIG welded for better quality welds
  • Precision CNC machined turbocharger V-Band flange.
  • Mirror polish or brush finish
  • Available with high temperature black thermal coating to reduce underhood temperatures.
  • Retains factory slip on style connection.
  • Compatible with the factory or aftermarket secondary downpipes.
  • Track tested durability.
  • Includes all hardware for complete installation.
  • Limited Lifetime Warranty.

Restrictions in the exhaust system robs horsepower and torque especially on turbocharged cars.  Thus, removing as much exhaust flow restrictions will increase horsepower and torque significantly.  The factory catalytic converter found in the factory downpipe is a big culprit of this and is a major exhaust flow restriction.  The factory catalytic converter is made up of catalyst material formed into "honeycomb" weaves.  Exhaust gas must pass through these tiny "honeycomb" weaves on their way to the exhaust system thus causing a major exhaust flow restriction.  It also causes turbulence after the catalytic converter which causes the exhaust flow to slow down (which increases restriction).  By replacing the factory downpipe/catalytic converter with our Competition Series Downpipe, more power is unleashed!  You will feel the difference instantly. 

Our Competition Series Downpipes is constructed out of 100% 304 grade stainless steel and utilize mandrel bent piping. They are 100% TIG welded by our in-house fabricators and built in the USA.  Factory Style flanges are CNC machined cut out of billet 304 stainless steel.  Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods.  The O2 sensor is positioned at the factory location.  100% bolt on. 

Our downpipes are designed to fit perfectly with either the factory exhaust system or your aftermarket exhaust system.  There are no compatibility issues whatsoever.  The downpipes will come by default with brushed finish.

The BMW XM (G09) has 2 primary catalytic converters and 2 secondary catalytic converters for a total of 4 catalytic converters.  Our Competition Series Secondary Downpipes replace just the secondary section You can retain the factory primary catalytic converter or aftermarket primary section.  Will match up to factory or aftermarket exhaust systems.  The secondary downpipes are after the secondary o2 sensor that monitors the catalytic converter so changing it will not set off a check engine light (CEL).

Ceramic Thermal Coating - The purpose of ceramic coating downpipes is to keep heat from the exhaust gases inside the downpipe from radiating out. This keeps underhood temperatures lower and less heat absorption by nearby parts/surfaces.  Another added benefit is that by keeping in heat (energy) in the exhaust gases inside the downpipe, exhaust flow velocities stay up, resulting in lower backpressure. The ceramic coating also adds additional corrosion resistance. We utilize the best ceramic coating possible. Our thermal coating can resist up to 2000F of heat. It is available in black only (all the other colors cannot withstand the high levels of heat).

CAUTIONThis product is intended for OFF ROAD COMPETITION USE ONLY. Not legal for use on pollution controlled vehicles upon public road/highways. THIS PRODUCT IS FOR SALE FOR ALL 49 STATES EXCLUDING CALIFORNIA.  In addition to vehicle use verification, a Vehicle Compliance Waiver needs to be signed.

THIS ITEM IS NOT FOR SALE, INSTALLATION, OR USE ON LICENSED VEHILES IN THE STATE OF CALIFORNIA. 

The item is for sale for international customers without restriction.

Please contact us at [email protected] or call us at (626) 334-6609

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: 49024646538

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4.2 ★★★★★
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Katherine
Massapequa, US
★★★★★ 2
Very uncomfortable
Size: 7, Color: Brown Patent
Most uncomfortable shoes I own. The middle part is so hard and digs into your toes making it really painful. I wear a lot of heels and never have I had a pair that hurt this bad.
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Reviewed in the United States on March 23, 2026
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Leesy McCorgary
Boise, US
★★★★★ 5
Great fit!
Size: 6.5, Color: Champagne
Great fit! Cute and comfortable.
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Reviewed in the United States on September 30, 2025
A
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Antonia McNeil
Port Orchard, US
★★★★★ 5
Foxxy Black Heel
Size: 6.5, Color: Black Patent
10/10 recommend. I love Steve Madden shoes. These were actually comfortable. I love the style and quality. The height was perfect for me. I was turning heads. The gold buckle and solid black made the heel pop!
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Reviewed in the United States on March 25, 2026
S
Verified Purchase
ShawNae
Whiting, US
★★★★★ 4
Heel girly
Size: 8, Color: Burgundy Patent, Size: 8, Color: Burgundy Patent
The bottom is very slippery and you need cushions to go at the bottom of them. You have to be a real heel girly to walk in them, slightly comfortable.
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Reviewed in the United States on February 13, 2026
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Verified Purchase
Christina
West Palm Beach, US
★★★★★ 5
Painful
These shoes are very cute but don’t plan on walking in them.
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Reviewed in the United States on December 18, 2025

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