I will check them. The part number 021.101.371J is listed as a 1.8
QUOTE(HAM Inc @ Nov 20 2011, 01:50 PM)
Those are actually 1.7 heads. They came off a 1.7. If they had been on a 1.8 the registers would have been opened to 105mm. Measure those and you'll see that they are actually ~100mm