power pros makes pipes for factory 7, trinity racing and for CT racing.. all these companies do is just slap their sticker on it
btw, ct says that they developed the sonic 240 kit and make it in house... its pure BS because they get it from LA sleeve and then add 600 bucks to the price tag for profit... after doing my homework, i found out most of the stuff ct sells is not their made product, usually just re-branded