Why are these to be used? As Ive got a fuck load of spare JP4 tappets but having problems with 2 bad ones in my set of J4s and Im fed up of having to drive 30 miles back home every week to rebuild my head lol, would be so much easier to use my JP4 units.
As far as I can tell the only difference is that the oil reservoir inside is smaller?
Cheers
As far as I can tell the only difference is that the oil reservoir inside is smaller?
Cheers