I love GSC cams. I love the S1's because I'm still on stock turbo, and they just work well with it. Ill be upgrading to the S3's soon. I have to say, I wouldnt run any other cam. Not saying there arent other good cams out there, but these simply get the job done lol. BTW, all your cars sound nice in the vids. OP, your car sounds great bud.