CLASS RACER FORUM - View Single Post - 427-425hp w/GM 401 heads

Pedigo Perf · 12-05-2012, 11:06 PM

The correct answer is start working on a new 2013 Camaro. Or look in the guide for the spec. That head also comes with 11/32 guides which must be opened up to 3/8 so the valve size it comes with is also subject to change to meet the NHRA spec for a particular combo.

12-05-2012, 11:06 PM	#2
Pedigo Perf Member Join Date: Feb 2008 Location: Wichita Ks Posts: 383 Likes: 70 Liked 30 Times in 17 Posts	Re: 427-425hp w/GM 401 heads The correct answer is start working on a new 2013 Camaro. Or look in the guide for the spec. That head also comes with 11/32 guides which must be opened up to 3/8 so the valve size it comes with is also subject to change to meet the NHRA spec for a particular combo.