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Yes they do. I really needed them to match my head. It is an R-sport stage 3 head. Lots of good stuff, big valves (any bigger and you'd need offset valve guides), very roomy and nice looking ports, double valve springs. The bad news is that it was used on a race car previously, and was shaved down MERCILESSLY. To about 12.5:1 on top of 2 liters, even worse on top of my 2.1 liter bottom end. I regained some CC's by reshaping the combustion chambers (smoothing, unshrouding the intake valve, matching the sides of the chamber to the larger bore) but ran out of metal I thought I should remove before getting enough valume. But the 12cc's of space in the piston dish worked out quite nicely. I still have a nice squish from the edge of the piston against the head (I was hoping for a .030 squish, but my attempted use of a .030 copper headgasket lasted about 2 blocks, now it has a thicker traditional style gasket), about 10:1 compression (blocked decked to zero the piston height).
As an additional bonus, these pistons would work nicely with a stock height B20F head (worked over) if I ever decide to add some boost to the motor (low compression for less detonation and more boost). The thought of John Parker's supercharger keeps popping up...
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I'm JohnMc, and I approved this message.
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