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XfireZ51 · 09-28-2011

The secondaries start out as 36mm on the cylinder head side. You can do port match and keep it within an inch. It all helps. I had 36mm porting on top end with a port match at the head. Still developed ~399rwhp.

09-28-2011	#5
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Ported Intake The secondaries start out as 36mm on the cylinder head side. You can do port match and keep it within an inch. It all helps. I had 36mm porting on top end with a port match at the head. Still developed ~399rwhp.