Pulled apart a built +1 Ferrea 058 head, the valve guides are not like the 058 guides like this.
#1) Part # 058103419 Pic here: https://www.europaparts.com/valve-guide-058103419.html
Yet have guides with a seat (unlike above) which many times place it to 2.0t's :
#2) Part # 037103419B Pic here:
Now it gets more confusing:
ECS states #2 does not fit, yet E-Eurparts says so per their car application sheet, yet Eurpoparts says they do not and companies go back and forth beyond that. Some mention of 2.8 V6 only, others state fine for 1.8.
As well, one of sites states these #2 are 7mm stem thickness yet running Ferrea valves which are 6mm (5.98mm per Integrated Engineering). So....?
Secondly per part #1, what sets the ~proper set placement/distance with no seat.....machine shop have to measure multiple times? That's the reason newer cars come with the seat to pull out guesswork?