SKU: 99904454326

AIRTEC Motorsport Downpipe Sports Cat for BMW G Series – M2, M3 & M4

Sale price$476.53 Regular price$529.48
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Pay in installments of $132.37 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

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For Your Every Summer RSVP, with Code: SUMMER15

Description

AIRTEC Motorsport Downpipe Sports Cat for BMW G Series – M2, M3 & M4By replacing the restrictive primary catalytic converters located in the original downpipes with specially designed high flow sports cats, back pressure is reduced, which effectively improves the engines breathing by allowing it to expel gases more quickly. This in return means faster throttle response, increased power output and a more aggressive exhaust note. Complete with replacement fitting kit, the downpipes will mate to a standard or aftermarket

By replacing the restrictive primary catalytic converters located in the original downpipes with specially designed high-flow sports cats, back pressure is reduced, which effectively improves the engine’s breathing by allowing it to expel gases more quickly. This in return means faster throttle response, increased power output and a more aggressive exhaust note.

Complete with replacement fitting kit, the downpipes will mate to a standard or aftermarket exhaust system and come wrapped in a heat reducing covering.

Will fit the following models:

•     BMW G87 M2 (left and right-hand drive)

•     BMW G80 M3 (left and right-hand drive)

•     BMW G82 M4 (left and right-hand drive)

Please note:

-     Sports cats are sold for motorsport and off road use only and may not pass a UK MOT test or police road side checks.

-     An ECU recalibration is required in order to ensure the EML is not illuminated.

Features:

•     Direct replacement part to fit both left and right-hand drive

•     200 cell sports cats reduce restriction

•     Made from high quality stainless-steel

•     Fits original and aftermarket exhaust systems

•     AIRTEC Motorsport laser cut plaque

•     Heat reducing covering included

•     Comes complete with fitting kit

AIRTEC Part No: ATEXHBMW4

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: 99904454326

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4.2 ★★★★★
Based on 20 reviews
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Verified Purchase
Robert Schneider
Phoenix, US
★★★★★ 1
Is this a Casper or Tempurpedic?
When I went to wash the pillow covering I discovered that it iterally had a Tempurpedic factory pillow covering underneath the Casper factory pillow covering - leading me to believe that it was either a return item shipped out as new, and the previous owner actually returned a Tempurpedic pillow disguised as a Casper, or Casper is actually manufactured by Tempurpedic and uses the Casper brand to upcharge. Either way - it's turned out to be an overly expensive - mediocre pillow.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 25, 2025
J
Verified Purchase
Joe G
Massapequa, US
★★★★★ 2
Does not cool, is hot actually
I am very disappointed with this product. I write a lot of reviews and give credit where credit is due. I wish credit was due here. I bought this as a gift for my wife. She slept on it for a few nights and finally stated that it never cools and is hot instead. And so I tried it and found the same thing. I bought an inexpensive cooling pillow from Costco and we both found that one to cool a little bit and it isn’t hot. I’m summary, you don’t always get what you pay for and at $100, this pillow does not deliver. It’s supportive and it seems well made, which is why I give it two stars. But it does not deliver any cooling. Save your money and try a different pillow.
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Reviewed in the United States on January 5, 2024
J
Verified Purchase
John
Whiting, US
★★★★★ 5
Does what it claims, supportive and eliminates heat.
Size: King (Pack of 1), Style: Single Pack
Its a bit pricey however when it comes to sleep quality im glad to pay for name brand. No tossing or turning to escape to the cold side of the pillow. Feels firm which was concerning at first however once you settle in its very comfortable. Seems to be just how foam pillows are made. Happy with the purchase.
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Reviewed in the United States on May 4, 2022
D
Verified Purchase
Donna Rollins
San Leandro, US
★★★★★ 5
I have found the PERFECT pillow for me!!!
Size: King (Pack of 1), Style: Single Pack
I just absolutely never write a review on anything, but I have to praise this pillow from the rooftops! I have not slept this comfortably is so many years! I have plushness and support, my neck is in alignment, and when I turn to sleep on my side the pillow doesn’t block my airflow. This pillow is perfectly made for me!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 8, 2022
M
Verified Purchase
moshe
Lowell, US
★★★★★ 5
Super comfy
Color: Soft, Size: Queen(28"×16"×5.9")
Absolutely love this pillow! It’s incredibly soft, supportive, and stays cool throughout the night. I’ve been sleeping much better since getting it. Great quality, perfect firmness, and definitely worth every penny.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026

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