Engine Block-off Plate - NSX (91-05)Engine block off plates for forced induction NSXs with aftermarket ECUs. Problem: For off road and race vehicles, recirculating exhaust gasses into your intake causes harmful build up on expensive aftermarket injectors and valve train components. Solution: Machined and anodized aluminum intake manifold and front cylinder head exhaust port block off plates. Tested to withstand 150 PSI without deflection. Features: Set includes 2 block off plates. New
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