I'm new to the US market of Rotary Tuning Parts and wanted to know the general consumers opinion on the following company's parts:

-Gotham, M2, Pettit, Rx7store, Racing Beat, Rotary Performance(BONEZ), and Rotary Extreme

I've noticed that these companies have been mentioned throughout the site and just uncertain on what each company is really know for in making their own parts...

 

It depends on the part, but in all actuality, most of those companies don't really "make" that many of their own parts -- with the exceptions of Racing Beat and Rotary Extreme. Nearly all of their parts (with the exception of some exhaust parts and some other odds and ends) are rebranded parts from other manufacturers. And M2 is out of business.