so i'm trying to sell my SLP y pipe (the one set up for aftermarket headers) and everyone keeps asking me if they will fit with different headers: pacesetters, kooks, etc. i don't know why they wouldn't fit with just about anything, is this correct? the only thing i could think of would be clearance if you had a lowered car. somebody help me out here! the one the guy is currently concerned about it pacesetter headers with my slp y pipe.