are vtec valves same in design to non vtec valves
wantin to put bigger ones in, only ones i found are brian crower ones but only 0.5mm bigger
while vtec intake valves are 2mm bigger on intake as is
are they same length and design?

while i cant be certain, im pretty sure the construction is different as well as the specifications.

also, i wouldnt really go any bigger than .5mm over, i have never seen anyone go over that

The valve seats probably wouldn't handle 2mm over. and the VTEC valves that I have seen for the VTEC B series are mostly 5.45mm Dia and 102mm long with the non V being 6.54mm dia and 106mm long. But I'm not a B series guy, this is just from reading specs.

yeh did lil more research they are diff length and stem width
found some other brand that does 1mm bigger so ill go with those
cheers guys

You may need to replace the valve seats with larger ones to accommodate the over sized valves. Quite pricey to do and hard to do right. It would be cheaper and you would be better off to get a Vtec head.