My suggestion would be to have your heads ported and polished (better flow= more power) while you replace the valves with 42mmx36mm sizes. That'll make for (you guessed it) better intake and exhaust flow. And from what I understand, those valve sizes are perfect for a 2ltr T-4 daily driver. My engine is a 2056cc with those valve sizes. It sounded great on the initial start up, but I've yet to get past the break-in procedures and actualy drive it. I should be taking a run down the street this weekend, though, so I'll let you know what kind of power the powerplant makes...
DAVID MANN
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