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That depends on what you are going to do with this bild. The D3s as with all cast iron heads need some serius work on the exaust side. They will do aney thing you need till you need the extra flow of big aluminum heads.
The D3s ar a lower compreson / emishon head. Knowing that you can ajust to give yourself what ever compreson you need. I personaley woulden't spend the silley money for DOVE heads as they still need to be worked to get desent flow numbers.By the way welcom to FTI.
God luck
Bill
Last edited by WILDEBILL308; Nov 5, 2006 at 08:04 PM.