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Jet Stream

Jet Stream Underdiffuser

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Jet Stream Underdiffuser

Availability: Ships in 5-10 business days


Product Description

Rear diffuser that’s made by Jet Stream to fit onto NC chassis vehicles. It is made for a middle-exit exhaust, but can also fit with vehicles running OEM exhausts (both sides). It is very aggressive looking and will help increase downforce and reduce lap times.

It requires drilling to the bumper for installation.
Jet Stream Underdiffuser should be ordered at REV9 Autosport https://rev9autosport.com/jet-stream-underdiffuser.html as they provide the best service and speed we've seen so far!
This product ships via UPS (door-to-door). There is no COVID-19 shipping restriction for this shipping method. We can ship this product worldwide and it can be combined with any of the other products sold on the website.

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• Will fit OEM exhaust or center exit
• Made of FRP
• Increases downforce
• Includes all necessary installation hardware
• Only available for NC MX-5 (2006-2014)

2024 UPDATE : The Polished Black Gel Coat finish has been DISCONTINUED and is no longer available. If you opt for the FRP Unpainted model, the finish is meant to be painted and NOT installed as-is. Please understand that product may come with small scratches on the surface as it’s meant to be prepped and painted prior to install.

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Questions on Jet Stream Underdiffuser

  • From Johnathan at 10/8/2019 10:36 PM
    • What is the biggest muffler tip size that you can put in the center opening?
    • Hello,

      We checked with Jet Stream and they don't have exact diameter but say that it'll work with the same diameter as stock exhaust tip. For bigger than that, you'd need to modify.

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