Welcome to our Fall Website Refresh. Beta testing in progress. Phone Number: 805-267-9762 This month's discount code: HALLOWEEK3 

Welcome to our Fall Website Refresh. Beta testing in progress. Phone Number: 805-267-9762 This month's discount code: HALLOWEEK3 

ZL1 Addons 2015-2023 Dodge Challenger Stealth Diffuser Fins & Rear Extension Pack

Our 15-23 Challenger Stealth diffuser fin and rear extension pack is designed to replace the fins on your ZL1 Addons Standard Challenger Diffuser and add the […]

$87.99

Available

$

ZL1 Addons 2015-2023 Dodge Challenger Stealth Diffuser Fins & Rear Extension Pack

Our 15-23 Challenger Stealth diffuser fin and rear extension pack is designed to replace the fins on your ZL1 Addons Standard Challenger Diffuser and add the larger rear extensions. This product is made of 3/8″ HDPE (Fins) and 1/4″ ABS (Rear Extensions). 

This product includes the 4 main diffuser fins, rear oversized extensions, or both, depending on the option picked below ONLY. It can only be used with a previously purchased ZL1 Addons standard Challenger diffuser. It does not include the main metal panel or mounting panel.

Made in the USA!

Product Fitment:

  • Challenger 2015-2023 All Models
  • *Note: While the main diffuser will work on Widebody vehicles, the rear extensions are only designed for the standard body at this time.

Product Finish: 

  • Standard Aluminum – This product will have an HDPE main diffuser and fins with a raw aluminum* attachment plate.
  • Black Powder Coat Aluminum – This product will have an HDPE main diffuser and fins with a black powder coated aluminum attachment plate.

Shipping:

  • This product is built to order and will take 2-3 business days to build and prep for shipment.

Install Guide:

  • Unbolt your diffuser from your vehicle and unscrew the 4 fins. Place the fins on the outside or inside placements. Hold fins straight and re-align with the existing holes to remount. With the fin aligned, use a 1/8″ drill bit to tap the fins first to avoid splitting the HDPE (Do not drill all the way through the fins) and use your previous screws to hard mount the fin to the diffuser panel. Repeat step for each fin and reinstall your diffuser on your vehicle. 

We’ve got your back!

Function Factory Performance takes “customer service” very personally. We understand that finding the right parts can be overwhelming. Education and awareness are the principles that keep us ahead of the curve. Let us make this experience simple, easy, and awesome, so without hesitation give us a call at (480) 576-8606, feel free to direct message on our live chat, or CLICK HERE to contact us via email.

Make sure to follow us on Instagram: @FFPerformanceAZ and Youtube.

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Frequently Asked Questions

How long does it take for my parts to ship?
If it’s in stock and ready to roll, your order usually hits the road within 1–3 business days.

For made-to-order or specialty items (like carbon fiber parts or custom builds), the turnaround can take up to 8 weeks — perfection takes time.

Either way, we’ll keep you updated so you know exactly when your parts are leaving the pit lane.
Do you send tracking with my order?
Absolutely. Once your order ships, you’ll receive an email with a tracking link so you can follow its journey from our shop to your doorstep.

If your order ships via freight, you’ll get a separate email with a direct link to the carrier’s tracking page — easy and stress-free.
What happens if my parts get lost or damaged?
Things happen on the road — even to boxes. If your order arrives damaged, snap a few clear photos of the box and product and send them our way right away.

If your shipment is lost, just email or call us — we’ll help track it down and guide you through the next steps to make it right.
What can I do to help FFP?
Simple — spread the horsepower!

Follow us on Instagram, YouTube, and Facebook, and most importantly, drop us a review on Google or Yelp to let others know about your experience.

Your feedback helps us grow, create more content, and keep bringing performance-driven parts to the community.

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