SKU: 52503604690

Sports Series High Flow Catted Primary Downpipe 2025+ M5 S68 Engine

Sale price$807.75 Regular price$897.50
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Description

Sports Series High Flow Catted Primary Downpipe 2025+ M5 S68 EngineIntroducing our new Sports Series High Flow Catted Primary Downpipes for your twin turbo S68 engine! Fits 2025+ M5 (G90). Key Features: Made in the USA! Manufactured in house. Now available for the 2025+ BMW G90 M5 S68 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

Introducing our new Sports Series High Flow Catted Primary Downpipes for your twin turbo S68 engine!  Fits 2025+ M5 (G90).

Key Features:

  • Made in the USA!  Manufactured in house.
  • Now available for the 2025+ BMW G90 M5 S68 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.
  • Mirror polish or brush finish
  • Available with high temperature black thermal coating to reduce underhood temperatures.
  • 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 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.

The BMW M5 (G90) has 2 primary catalytic converters and 2 secondary catalytic converters for a total of 4 catalytic converters.  Our Sport Series High Flow Catted Primary Downpipes replace just the primary section You can retain the factory or aftermarket secondary downpipes.

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: 52503604690

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Ckelly
Battle Creek, US
★★★★★ 5
It's a thing...
Flavor Name: Vanilla, Size: 14 Servings (Pack of 1)
I am probably the most skeptical person when it comes to supplements. I’ve tried so many over the years and honestly… most of them felt like a waste of money or just hype. But I have to say—this combo has completely surprised me. I’ve been consistently using Thorne protein and creatine, and within a few weeks I started noticing real changes. Not just how I feel, but how I look. My shoulders especially are looking more defined, and I feel stronger in my workouts without feeling jittery or weird like some products can make you feel. What really stands out to me is how clean and simple it is. No bloating, no heavy feeling, no unnecessary extras—just something that actually supports what I’m already doing. I also love that it fits easily into my routine. I take my creatine with my morning coffee (super easy habit), and I’ve been doing a protein shake after workouts which has helped a lot with recovery and keeping me on track nutritionally. I’m currently in a calorie deficit getting ready for a trip, and this has honestly made it feel doable without feeling depleted. If you’re someone like me who is hesitant about supplements, I’d say this is the first time I’ve actually felt like something made a noticeable difference.
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Reviewed in the United States on April 3, 2026
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Kathy F
Louisville, US
★★★★★ 4
Good Quality
Flavor Name: Vanilla, Size: 30 Servings (Pack of 1)
It is good quality but too sweet for my taste.
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Reviewed in the United States on April 29, 2026
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Megan R.
Dallas, US
★★★★★ 5
I didn’t know I could truly love a protein powder…
Flavor Name: Vanilla, Size: 30 Servings (Pack of 1)
The flavor and consistency are unmatched and it was actually easy to digest which is something I’ve never experienced, and is crazy for me bc I have serious issues with whey causing bloating and had actually given up on it completely. 100/10 would recommend JUST bc it’s delicious, the fact that it’s such high quality at a reasonable price is just the cherry on top. I ordered the vanilla to try first and just mixed with cold water using a frother/whisk thing just to get a gauge of taste and consistency and I would actually drink it that way, which I never ever imagined doing with protein lol- later I added it to a smoothie and it was also delicious, almost could not taste it over blueberries but the subtle and delicious vanilla flavor was there.
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Reviewed in the United States on June 7, 2025
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Murphy
Fort Morgan, US
★★★★★ 5
Pleasant taste, nice texture.
Flavor Name: Vanilla, Size: 30 Servings (Pack of 1)
Works well in my afternoon smoothie. Pleasant vanilla taste.
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Reviewed in the United States on March 16, 2026
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monster
Chelsea, US
★★★★★ 5
Sublingual works well for melatonin!
Size: 60 Count (Pack of 1), Style: Melatonin 5mg
Sublingual seems to be the way to go with melatonin. It works well for me. It’s great this company offers a variety of doses. I was doing 10mg but I learned it might not good to stay on that high a dose for an extended period of time. So I switched to 5mg and it still works well.
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Reviewed in the United States on January 21, 2025

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