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Ed Carpenter · 12-07-2010, 08:28 PM

I think the 520T has more material for porting. All the super stock motors have the 520T. Better head all around for SS.

12-07-2010, 08:28 PM	#2
Ed Carpenter Live Reporter Join Date: May 2006 Location: Dripping Springs, Tx Posts: 2,709 Likes: 186 Liked 520 Times in 132 Posts	Re: 520T heads ??? I think the 520T has more material for porting. All the super stock motors have the 520T. Better head all around for SS. __________________ Ed Carpenter 2005 Chevy Cobalt A/SM Race Engine Development