Yellowspeed Coilovers?

Has anyone heard of or have any experience with Yellowspeed? I found a set of Yellowspeed Dynamic Pro Sport Coilovers for sale locally for $650. Are these any good? Or garbage?

https://yellowspeedracingusa.com/co...oilovers-2010-2013-mazda-3-bl-incl-mazdaspeed

 

Same ballpark as BC, ISC, Scale, Feal, and just about every other ~$1000 coilover. They’re decent for daily use.

 

Are they even decent for track use? For reference, I'm on Koni orange (Str.t) struts with corksport springs, so pretty low bar right now as far as track set up goes lol

 

Well the spring rates on them suck real bad. And the valving won’t be any better then your Koni’s. If you’re interested in track use look at a set of Bilsteins. Either b12, b14, or if budget permits b16. If that’s out of the budget consider a set of ST coilovers. They’re basically kw v1’s and I tracked on them for years

 

Good to know. Will have to look into ST, never heard of it but sounds promising. Thanks for the input and suggestions!