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Hello all
I was wondering if you guys think of my idea for my 2007 Pontiac G6 GT 3.9 6 spd manual, I plan on going to the local performance shop, Im interested in getting Comp Cam's rocker arms installed I have found rocker stud size 3/8 and 7/16 I'm not sure what size it will need and also 1.52 and 1.6 ratio didn't know if 1.6 was to big. I found all the variables for getting the parts, just don't know what the specs are on the motors stock one's does anyone know? Also I planed on getting the WAMS tune but, i figure if i do this I'm probably gonna have to get a custom tune instead if they do this. Let me know what you guys think.
 

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IIRC the stock ones are 1.7 already, also if you go bigger the lower intake manifold is probably going to get in the way and you would need to do some grinding to get them to fit...
 
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