Heads Ported and Polished

[SilverViperGTS]

Is it possible to have the Viper's heads ported and polished?? How much does it cost? How many hp's is it possible to gain?

Thank you!

 

[Daniel Cragin/DC Performance Inc]

We have 3 stages of ported heads for Gen 1-3 Vipers. What stage of porting and the components used depends on the application. Please feel free to call us for a qoute.

 

[Qualitywires.com]

Dan, what kind of increases would you expect with the paxton set up and the heads ported and polished along with an extrude hone plenum?