#11

10-08-2014, 11:43 AM

frank.g

Member

Join Date: Jan 2014

Location: Central NJ

Posts: 78

All SD's built for production (the ones with an "X" in their VIN) were after the emission change over date, so all have the later emission system. Some intake manifolds were originally manufactured for the earlier system, and they were re-tapped and stamped with the later part number. Occasionally, you can see the double stamp on some of these manifolds.

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