This is a fantastic product. Very light weight. Performs extremely well. Had to adjust chain once after install so far. I stayed with the stock 530 chain. Only went up one tooth and didn't need a new chain. Very happy with the purchase. Looks great too!
The question is what are you trying to do? Your current gear ratio is 3.21 and you'd be changing it to a 3.13. The smaller the ratio the more top end. In this case you'd have a little more top end speed but be a little slower off the line.