Quote:
Originally Posted by Jan E.
Looks like the M3 has a valve with no or less restriction (PN: 21522283914)
Cheaper than the modified ones, and easier to get 
Have not tried it yet, but it’s on order.
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Finely got time for the switch.
M3 valve is way bigger in diameter. And would guess as big hole as the modefied ones. (Maybe some even sell the M3's claming it's a "modefied" one to higher price?
So if you just can't remove the valve. But need a replacement due to hose length or other things. The M3 valve PN: 21 52 2 283 914 has no restriction.
Now my car has no lugging or jerking under shifting anymore.