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AUDI A8/S8/RS8
AUDI R8
Audi Q8/SQ8
Enhance the look of your Audi with the B8.5 Audi A4 S-Line/S4 CAP Carbon Fiber Diffuser V1. Made with high quality carbon fiber, this diffuser will enhance the sporty look of your Audi while still remaining elegant. This diffuser is crafted of high quality hand laid carbon fiber.
The B8.5 A4/S4 platform looks very aggressive when paired with an upgraded rear bumper. Here at Canadian Auto Performance, we make sure to bring the highest-quality diffusers, making your Audi's as special as they can be!
Don't forget to tag us on Instagram and use the hashtag #b8.5 s4 diffuser and #b8.5 s4 rear diffuser to get featured on our page!
Make sure you compliment your new CAP carbon diffuser with one of three CAP carbon fiber trunk spoilers available.
Wiring Instructions:
The LED light has been refreshed to a newer design.
Red is the live wire.
Black is the ground wire.
Yellow is the brake light wire.
Install Instructions Disclaimer:
Professional install of this carbon diffuser by someone who has aftermarket product experience is required.
Rear bumper must be removed to install this carbon fiber diffuser properly.
This diffuser fits a B8.5 Audi A4 S-Line & S4.
It does not fit a B8.5 Audi A4 non S-Line.
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I love it was so easy to put on and wiring the 3rd brake light couldn’t of been easier I love this diffuser and it makes my s4 pop so much
Easy to install, took maybe 10 mins at most, and looks great in the sun
Fits my 2013 S4 perfectly, looks agressive. Having this and the right catback exhaust system makes it a perfect match. Shipping was quick
Great quality parts 👌 great customer service 👍definitely happy with every purchase I've made worth e every penny
My bagged b8.5 s4 looking clean fully cap out 🤙👌
Finally found a diffuser that looks aggressive and actually FITS my S4 perfectly. I’ve tried others in the past and none have fit this seamlessly. It changed the whole look of my car with an aggressive stance (and my kids love it.) Can’t recommend this product enough!
