hi guys ive got these on my car an thinking of porting my vf34 turbo to match the uppipe diameter. will it make a difference in spool up or is it not worth doing? im not porting the heads of the manifold. turbo is not on the car yet.
thank lads

 

Speak to Harvey

 

It is worth doing just to get smooth air flow in to the turbo and you can do it yourself, however, the thing to do on the VF34 that is more important and can be done at the same time is to port the wastegate.