My "Lifetime DISA valves" turned up from the US - £60 in import duty.... They feel good quality- billet pin, drain plug, etc so they should last. I'm going to fit the top one myself tomorrow. Might tackle the lower one if I get chance but from what I understand, it's mostly the top, larger one that goes (mine definitely has! It's currently a DISA flap).
Just gonna dig behind the sofa to see I've got any pocket change for these:
OEM 19" CSL wheels
Lifetime DISA spec (n52parts.com):
- Single Piece Billet Aluminum Rotating Pins with Torx shaped key
- 3D Printed PAHT-CF High Temperature Resistant Flaps
- Torx shaped axis slotted through entire flap. Impossible to round out!
- OEM style Flap turbulence grid
- 5mm drain plug in the event of oil intrusion
- Fully assembled using Aftermarket DISA electronics / shells
- Hand assembled with high temperature resistant lubricant on all moving parts