m y dealer said it is a must do for hot starts. they have seen problems any time they up compresion.right now there winter special is 1500 with full tune and stage three is 2200 with full tune.thought those where some good prices with a full tune.almost forgot those prices are with acr installed.

 

It's better to do them now when the heads are off, then to not do them and need them and have to tear the heads off again. They are cheap insurance and will give your starter an easier time on hot restarts.......going to 103" is going to raise your CR.

Steve