Mopar Performance intake valley pan set for all big blocks. Set includes the steel valley pan and steel heat crossover block-off plates. Note: The block-off plates are used to stop the exhaust gases from running under the manifold in order to keep the manifold cooler (keeping the air/fuel mixture cooler and giving the engine more power). But if the plates are used, engine warmup will take longer and the automatic choke will not function properly.

Part# TM-86826

Intake gasket heat block off. Stainless steel heat block-off plate and intake gasket blocks exhaust heat from transferring to the intake manifold for a cooler, denser fuel-air mixture. for RB big block engines

Compatibility: 1958 - 1978 B-Body Availability: Special order

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Part# TM-86826