how much diff is there in pistons with 2VR as to pistons with 4vr and what are the pro's and con's and is there any way to no how much piston to valve C i will have???

thx

 

i just priced out the 2vr piston and $$$ , just it there that much diff in performance...

thx

 

The only real difference is how much volume the valve reliefs have. 2vr will have less volume and there fore your compression ratio will be a little higher. The 4vr piston can be used in any hole due to the valve relief's on both sides of the piston. The 2vr piston there are two different pistons.

If you are trying to attain maximum quench area you'll want the 2vr pistons.