Allstar Performance Lifter Valley Vents — SBC 1/4in NPT, 8pk | ALL90065 1984-chevrolet-el-camino-esi2228323 Skunk2 designed its Pro Series

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Allstar Performance Lifter Valley Vents — SBC 1/4in NPT, 8pk | ALL90065 1984-chevrolet-el-camino-esi2228323 Skunk2 designed its Pro SeriesAllstar Performance lifter valley vents are machined aluminum with a clear anodized finish and a hex head for easy installation with a wrench. Each vent uses a 1 4in NPT thread and is designed for small block Chevy (SBC) lifter valley covers, allowing crankcase ventilation. Sold as a set of 8. FAQ What thread size are these lifter valley vents? These Allstar Performance lifter valley vents use a 1 4in NPT thread. What material are they made from? They