This item for auction is the top spacer that goes between the top plenum chamber and the intake. The lower intake manifold insulator (between the intake manifold and cylinder heads) is available separately.
Is "PERFORMANCE PLENUM SPACER for FORD BOSS 260-290-315 V8 5.4L" the top spacer that goes between the top plenum chamber and intake or does it go between lower intake manifold and head?
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