im looking to get my 250 head rechamberd by a local shop is it worth the 65 dollors what will it add? im also thinking about buying a Wiseco piston is that really much more reliable then the stock piston and would it add any performance to my trailblazer

 

yes go with the wiseco piston the polaris pistons sux it will crack

 

You dont have to rechamber the head. Just flat mill .020 off the bottom and your ready to go. The squish area is too wide and it wont hurt a thing.