how much do they help on a mildly modified gsr??? and is this a DIY type of project? i just wunna know if its worth the money!!!

 

It will raise compression to around 12:1, so I wouldn't consider it unless you have some engine management available to tune the car. It may have issues running on pump gas too.

I wouldn't consider piston swaps as a DIY unless you really know what you are doing. It would probably take around 9-10 hours if, and only if, you knew what you were doing. Otherwise, it will be a complete nightmare. You would also have to rering it and hone it.

 

bump for the misprint. isaid pistons and i meant cams!!

 

In that case...I would highly recommend it.

I have a set in mine right now and they are pretty easy to put in if you know what you are doing and provide a good gain.