I just found out i am only runnin an A-trim on my new notch. I ran a T-trim on my other notch for 3 years and made 530rwhp. Would i be better off with the YS or YSI?? How much can i pick up a YS head unit for or YSI?? Only thing i would really need is a race bypass. Does the YS head unit use a bigger discharge tube than an S or T-trim?? My A-trim has the upgraded S-trim discharge and plastic bypass with a powerpipe.
