SKU: 83978941667

Active Autowerke Catted Downpipes (GESI G - Sport Cats) - BMW / F8X / S55 / M3 / M4 / M2 Competition (11-080)

Sale price$1282.08 Regular price$1424.53
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 16 - Aug 21

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Description

Active Autowerke Catted Downpipes (GESI G - Sport Cats) - BMW / F8X / S55 / M3 / M4 / M2 Competition (11-080)Active Autowerke's catted downpipes (GESI G Sport Cats) offer precise fitment for BMW F8X S55 models including F87 M2 Competition, F80 M3, and F82 M4, engineered to enhance exhaust flow and performance. Includes a pair of 4" ultra high flow GESI catalytic converters (Gen 2 Advanced) that will not trigger a Check Engine Light (CEL) Constructed from full 304 stainless steel, including furnace brazed substrate for durability EPA registered and compliant

Active Autowerke's catted downpipes (GESI G - Sport Cats) offer precise fitment for BMW F8X S55 models including F87 M2 Competition, F80 M3, and F82 M4, engineered to enhance exhaust flow and performance.

  • Includes a pair of 4" ultra high flow GESI catalytic converters (Gen 2 Advanced) that will not trigger a Check Engine Light (CEL)
  • Constructed from full 304 stainless steel, including furnace-brazed substrate for durability
  • EPA registered and compliant in 49 states, fully OBD2 compliant (1996 and newer vehicles)
  • G-Sport High Output catalyst rated for engines between 500-850 horsepower
  • Features GESI's proprietary precious metal loading technology for greatly reduced emissions
  • Cast upper stainless steel V-Band connection ensures precise fitment
  • Withstands temperatures up to 1500°F and reaches operational efficiency within 9 seconds of startup
  • Easily bolts on with no cutting or welding required, compatible with OEM O2 sensor heat shield
  • Designed to reduce back pressure and improve turbo spool, response, and mid-range performance
  • Covered by a 5 Year / 50,000 Mile warranty on shell and tube ends, plus 2 Year / 25,000 Mile warranty on catalytic core
  • Manufactured in Miami, Florida

Note on Legal Compliance: These catalytic converters are not legal for use in California due to California Vehicle Code Sections 27156 and 38391. Federal law prohibits tampering with emissions control devices; however, the GESI catalytic converters are EPA compliant and meet emissions standards outside of California.

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: 83978941667

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Mariel
West Palm Beach, US
★★★★★ 5
Well made, light fabric. Waist doesn't roll.
These bamboo underwear really do keep you cool. They fit true to size, and wear easily. the wide elastic waist band doesn't roll on me. They are comfortable to wear, washed and dried easily. The material has some stretch to it, but not a lot. Well made, no stray strings. Perfect fit for me. Just what I was looking for.
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Reviewed in the United States on May 17, 2026
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Finngirl
Lexington, US
★★★★★ 5
Good quality, smooth feel
I got these briefs so recently that have washed just one pair so far. First off, these are very comfortable, the material is soft & bordering silky, good quality sewing. Wash well and minimal if any shrinkage. They do come a bit wrinkled from the dryer but hey, these are underwear and will go on smoothly. If it were a t-shirt, I would look sloppy. I feel the sizing is accurate. No rolling and these don't announce themselves under clothing. Planning on getting more of these boxers and replacing my old panties.
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Reviewed in the United States on January 31, 2026
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Skurtzo
Chelsea, US
★★★★★ 4
A little snug on the thighs
Size: Medium, Color: Multicoloured G (5-pack)
Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
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Reviewed in the United States on August 29, 2025
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Shanna
Battle Creek, US
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
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Reviewed in the United States on April 13, 2026
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ClairY
Belleville, US
★★★★★ 5
Finally!
Size: X-Large, Color: All Black D (5-pack)
Finally, comfortable underwear that don’t end up giving me a wedgie. I have a round booty and most cuts of underwear end up shifting as I walk and sit. The hem of the underwear comes right under my cheeks and the lightweight material ensures there’s no panty line and no shifting to where I don’t want them! I’m definitely purchasing more.
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Reviewed in the United States on May 17, 2026

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