I just bought a set of CNC 5.3 heads from a member here. I was wondering if it was worth the trouble and expense to mill them? My current mods are LTs, TBSS intake, CAI, baby EPS cam, 2800 converter. Thanks

 

It all depends on the CC of the combustion chamber for the CNC heads you bought.

Bumping the compression is worth roughly 5-10 depending on how much you bump it. It certainly won't hurt you especially with the mods you have.

 

True. The stock cc is around 62 CCs I'm thinking of dropping it to bout 58cc