1999 vs mach 1 lower intake runner pics

[shurur]

I just thought I would post up a couple of pics of the two intakes.
The real difference has to be felt with your hands.
The AL Flashing shows a bit in the first pic.

1999 cobra "unfixed" (XR3E-BF 12-05-98)
1999 Pre Ford "Fix" lower intake manifold = 230 CFM
Ford part # XR3E-9S455-AC

2004 mach 1 (XR3E-BH 02-13-04)
Custom 2004 Mach 1 Extrude Hone manifold = 290 - 310 CFM
Ford part # XR3E-9S455-AE

 

[lOOKnGO]

Where did the cfm numbers come from?

 

[shurur]

Where did the cfm numbers come from?

tmhutch post #10:

""1999 Pre Ford "Fix" lower intake manifold = 230 CFM
Ford part # XR3E-9S455-AC

1999 Post Ford "Fix" lower intake manifold = 242 CFM
Ford part # XR3E-9S455-BA

Custom 2003 Mach 1 Extrude Hone manifold = 290 - 310 CFM
Ford part # XR3E-9S455-AE (This is the same part number as the 2001 Cobra.)""

https://forums.corral.net/forums/svt-dohc/615081-extrude-hone-results.html