YES!!!!! you will feel the difference, it makes the car alot more forgiving. my B4 is faster and lighter than my 22, and as long as i'm perfect with my B4 i'm about .5 a lap faster. but my 22 has big bores, and you can get a little out of round and still keep going. small mistakes and bumps dont upset the car as much, allows you to be a little off either short or over jumping, and doesnt flip or fish tail out of control. I'm getting a set of big bores for my B4. guys at my track have let me run theirs and definately makes the car more driveable for those of us who aren't pro's.