Performance Improved Heads
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Joined: May 2002
Posts: 594
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From: Wetumpka, Alabama
Performance Improved Heads
Can someone please verify for me what year/models did the Performance Improved heads start appearing on the Modular series engines.
Thanks!
-ERIC
Thanks!
-ERIC
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Joined: May 2002
Posts: 1,673
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From: Chicago Area
Performance Improved Heads
[updated:LAST EDITED ON 25-May-02 AT 12:37 PM (EST)]Look at the 4.6 vs. 5.4 thread. "Petrol" said that '99 up 5.4 F150's had them, but SD's and Expy's used up the old style 'til summer '99. Don't know the story on 4.6, but since they're made in the same plant (and actually seem to be the same except for crank shaft (longer stroke) and cams (greater valve lift)), I would assume useage is similar. Petrol also told us how you can tell which you have.
MrBSS
MrBSS
Performance Improved Heads
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