Yup, 2 valve system. I have zero miles with it installed, so it'll be awhile before I drain it. Car sits idle as I'm away a lot. I wish there was a way to tell how much it actually catches.....30%, 70%, 5%? Who knows? I installed a can on another NA car and it seems to work well but again, what percentage is it actually catching? Never seen an advertised amount probably because there is considerable blow by which would hurt sales.