LS1 Cathedral Port Cylinder Head to LS3 LSA ZL1 CTS-V Rectangle Billet Intake Manifold Adapter Plates (Silver). Model: LS1 Cathedral Port Cylinder Head. Will not fit raised port LS7 intakes. Premium Aluminum,Intake manifold bolt lengths required when used with Car intake manifold (M6 x 130mm) Truck, intake manifold (M6 x 90mm).
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