Anybody here running any set of RS style oval tips on their B9 A4?
To my knowledge you need to run an S4 diffuser, wonder if anybody here had any experience with that.
https://www.mlperformance.co.uk/prod...35171895083167
https://www.ebay.com/itm/3-Inlet-RS6...UAAOSwV0RXszlK
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