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Cobra R's
2000 Cobra R Heads
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<blockquote data-quote="JKCOBRA98" data-source="post: 76451" data-attributes="member: 647"><p>I can tell you from experience that you cannot take the heads off a DOHC motor wile still in the car.. It is best to remove the motor and place on a stand.</p><p></p><p>The heads reportedly from Ford sources were a FR-500 style with a higher port and bigger valves installed.. the only porting work done was just polishing.. This was to remove casting flash. Each cylinder head is supposed to marked with individual numbers to show what car they are from. This is also to indicate it is an R head.</p><p></p><p>So if you are to take a production 99-01 DOHC Cobra head you would still find differences in the intake side ports and also the valves are larger. The FR-500 heads are suppose to be a closer match to the R head. Still there will be a slight difference as the R heads were cleaned up with a polishing job. No casting flash.</p><p></p><p>Hope this helps.</p><p>Matt</p></blockquote><p></p>
[QUOTE="JKCOBRA98, post: 76451, member: 647"] I can tell you from experience that you cannot take the heads off a DOHC motor wile still in the car.. It is best to remove the motor and place on a stand. The heads reportedly from Ford sources were a FR-500 style with a higher port and bigger valves installed.. the only porting work done was just polishing.. This was to remove casting flash. Each cylinder head is supposed to marked with individual numbers to show what car they are from. This is also to indicate it is an R head. So if you are to take a production 99-01 DOHC Cobra head you would still find differences in the intake side ports and also the valves are larger. The FR-500 heads are suppose to be a closer match to the R head. Still there will be a slight difference as the R heads were cleaned up with a polishing job. No casting flash. Hope this helps. Matt [/QUOTE]
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