anybody know what size Ls valves are? i think they are 31mm or something. also what size are the b series vtec valves?, are Itr valves bigger?

Im thinking about putting bigger valves in my ls head, is it possible to use the vtec valves? i would have to get the vtec valve seat also too right?

 

would i have to worry about piston to valve contact if i got bigger valves? cause i know the pistons have the valve reliefs cut for the stock valves. im thinking i wont have to worry about that because people throw vtec heads on stock ls blocks all the time. anyways

 

ttt

 

ttt