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View Full Version : Diffuser/Rear Valence options for B8.5 A4 S-line



Nyx
07-11-2023, 02:20 PM
I've tried scouring the net and forums for a diffuser that replaces the rear valence on the b8.5 s-line a4, similar to what ECS tuning has for the B8 non s-line.

https://www.ecstuning.com/b-ecs-parts/audi-b8-a4-pre-facelift-non-s-line-rear-diffuser-single-outlet-gloss-black/039684la01-01~a/

Now, I'm going for pretty much that look (single driver side cutout), but from what I can find ECS tuning only makes the double exit version for my car and the b8 non-sline stuff will not fit because they are different parts/shapes.

The Maxxton design bolts on to the exiting valence, which isnt what I'm looking for.

The only option I've found is this one from Caractere, sold in Canada by LLTEK (but caractere have distributors elsewhere): https://www.lltek.com/audigate/html/audi-a4-b8-8k2-fl-body-kit-caractere-2013.htm but they are allegedly asking for 1100 CAD for something that is worth at most 300 CAD. I've sent an email asking for more info so I'll update if this works out but I really just need to know if there's diffuser options out there that I'm not aware of [confused]. I cant be the only one aiming to do a single exit exhaust for their B8.5.

adamazing
07-11-2023, 03:25 PM
Gonna be real slim pickings. You're only real hope is some obscure stuff on eBay.

The S-Line bumper is a direct hand down from the S4, whose diffuser has two exhaust cutouts by default. So the aftermarket diffusers that are available are mainly designed to support the S4/dual-side exhaust market. There's never been much incentive for any companies to develop aggressive single-sided S-Line diffusers because most people with S-Line bumpers drive S4's, or are A4 owners that upgrade to dual-sided exhausts.

Nyx
07-13-2023, 12:39 PM
Ahh that explains a lot of things. Thanks adam


You're only real hope is some obscure stuff on eBay.

Ebay seems to have only dual sided diffusers, which is what I expected so c'est la vie.

Follow up on the bumper: LLTEK quoted 860 USD for the caractere diffuser. I think the Canadians are out of luck on this one. BK motorsports also sells it for the US, on sale for 519 USD currently: https://bk-motorsport.com/tuning/audi/audi-a4/audi-a4-b8-fl/s-line-rear-diffuser-1-large-exhaust-pipe-cutting-1-8-2-0-tfsi-2-0-tdi/ but with shipping to Canada its around 900 USD so I don't think its worth for me.

cybernet99
07-21-2023, 04:14 PM
I bought the ECS Tuning rear diffuser and then fiberglassed the passenger exhaust opening to keep it single sided to be true to the A4 look. https://www.instagram.com/reel/CoOSnp0Ak8P/?utm_source=ig_web_copy_link&igshid=MzRlODBiNWFlZA== Check out some of the other posts on my IG (More Recent) to see the finished look after painting and mounting on the car. IG https://www.instagram.com/alterda4