Yes i have CR performance guy is awsom.
Tell them Brian sent you.
I love em but even after having them balanced i am having issues with noise but it may be normal.
Im the only perso i know of that has actually installed these.
Although CR has very good feed back on eBay but no reviewers that help.
car even runs great on stock tune or any other you can throw at it.
Spools almost instantly .
I have no idea what bost im hitting yet but will soon.
I just hope the sound is normal and epuld love to hear from others that have them .
Based on my experience even with tje sound for the price its a good option .