SKU: 77474333200

Sport Series High Flow Catted Downpipes for 2015-19 X5M & X6M S63 Engine

Sale price$987.75 Regular price$1097.50
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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20

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Description

Sport Series High Flow Catted Downpipes for 2015-19 X5M & X6M S63 EngineIntroducing our Sport Series High Flow Catted Downpipes for your twin turbo S63 engine! Fits 2015 19 X5M (F85) & X6M (F86). Key Features: Made in the USA! Manufactured in house. Now available for the 2015 19 BMW X5M & X6M S63 Engines! High Flow 200 cell metallic catalytic converter 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.

Introducing our Sport Series High Flow Catted Downpipes for your twin turbo S63 engine!  Fits 2015-19 X5M (F85) & X6M (F86).

Key Features:

  • Made in the USA!  Manufactured in house.
  • Now available for the 2015-19 BMW X5M & X6M S63 Engines!
  • High Flow 200 cell metallic catalytic converter 
  • 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.
  • Retains factory donut style gasket.
  • Mirror polish or brush finish
  • Available with high temperature black thermal coating to reduce underhood temperatures.
  • Compatible with the factory or aftermarket exhaust systems.
  • 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 Sports Series High Flow Metallic Catted Downpipe, more power is unleashed! 

We use a 200 cell metallic core for our Sports Series High Flow Catted Downpipes. By having less cells per square inch, these individual "cells" are bigger in size thus allowing exhaust gas to pass through it more easily. Thus, the lower the cell count, the higher the flow. Higher flow = more power, faster turbo spool up (less turbocharger lag) and better throttle response. Bottom line, faster. The benefits of a metallic catalytic converter vs a ceramic like the factory is that it can take higher temperatures and is more durable (last longer). They are also lighter than their ceramic counterparts.

Our Sports Series High Flow Catted 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.  The factory turbocharger turbine housing utilizes a 3.5" V-Band flange which we have duplicated and 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.

OPTIONS

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: 77474333200

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★★★★★ 5
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These pillows are great! So comfy, no neck or back pain. I highly recommend them!
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Reviewed in the United States on May 1, 2026
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Kenenna Oyeka
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★★★★★ 5
⭐️⭐️⭐️⭐️⭐️ Incredible Comfort – Like Sleeping in a Luxury Hotel Every Night!
I am beyond impressed with the DIORIS Pillows Queen Size Set of 2! From the moment I laid my head on them, I knew I had found my new favorite pillows. They strike the perfect balance between soft and supportive, making them ideal for back, stomach, and side sleepers like me and my partner. The fluffy down alternative fill feels just like the real thing—plush, breathable, and incredibly comfortable without triggering my allergies. These pillows don’t flatten out overnight either; they maintain their shape and bounce back beautifully each morning. What really stood out to me was the hotel-quality feel. The outer fabric is smooth, skin-friendly, and breathable, helping me stay cool and sweat-free throughout the night. I wake up feeling refreshed, well-rested, and with no neck pain—which is a huge win! If you're looking for affordable luxury, I highly recommend these DIORIS pillows. They’ve completely upgraded my sleep experience, and I’ll definitely be buying another set for the guest bedroom!
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Reviewed in the United States on June 4, 2025
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James Amsler
Waukegan, US
★★★★★ 5
Pillowd
Color: Blue, Size: Queen Size Set of 2
They are huge and very fluffy queen size pillows, and they’re so comfortable. I’m actually laying on one right now.
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Reviewed in the United States on May 29, 2026
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MDecker
Pawtucket, US
★★★★★ 5
Helps you get a good night's rest
Color: Blue, Size: Queen Size Set of 2
These are my favorite pillows. I've had so much neck pain and headaches in the morning. This all stopped once I started using them. They hold up their shape and seem like they are good quality. My husband kept trying to steal my pillow, so I had to order him his own. You won't be disappointed in these pillows, and you'll get much better sleep.
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Reviewed in the United States on May 26, 2026
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AnnMarie Rodriguez
Draper, US
★★★★★ 4
Very soft!
Color: Blue, Size: Queen Size Set of 2
I like the softness of these pillows. They are too bulky for me but my husband loves his. I’ve been using a flat pillow for too long. I may just need to adjust to it.
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