Selling my BNIB supertech dual valve spring kit. Yes as you can see the package has been opened. Even further these springs were semi installed on a set of heads. Why brand new you say? Well that's as far as they got. I'm running Ferrea's super comp valves which are a 6mm stem diameter. Stock valves are also 6mm but taper down to 5.5mm at the lock end. Well these springs/ titanium retainers are designed to work with stock style valves ( Ferrea does sell a valve that's tapered like an oem one, but not for extreme use). I went to install the valve locks and sh*t they don't fit. So I pulled them and bought a full set of Ferrea springs, retainers and seats.

So now I have these let over. Brand new they retail for around $550. Im sure someone sells them for a bit less.

Im asking $450 shipped. No trades please.