I am considering installing the Comp cams stage 2 XFI NSR #127200. These are the ones that they do not require spring replacement. Has anyone installed them? Are you happy with them? Did you feel the hp gain and if there is a change on the way the car sounds? Is it a self install with a can tune from brenspeed? I recall seeing some detailed instructions but I cannot find them Looked at Takobills but I cannot seeit.Any suggestions?

 

This is for the hotrod cams but should provide a good starting point.

https://mustangforums.com/forum/4-6l...ion-guide.html

 

Thanks Bro. thats really good.