Description
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Converts spin‑on filter port to 1/8″ NPT for precise oil pressure gauge hookup
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Durable steel construction withstands shop‑floor use and high pressures
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Designed for GM Gen IV/V V8 engines—Corvette, Camaro, Tahoe, Silverado
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Enables engine pre‑lubing via GM‑21867 or similar preluber tools
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Saves time and reduces engine wear during diagnostics and rebuilds
Make Model Engine(s) Years Chevrolet Corvette V8 (Gen IV/V) 2005–present Chevrolet Camaro V8 (Gen IV/V) 2009–present Chevrolet Tahoe V8 (Gen IV/V) 2005–present GMC Yukon V8 (Gen IV/V) 2005–present Cadillac Escalade V8 (Gen IV/V) 2005–present Chevrolet Silverado V8 (Gen IV/V) 2007–present
Oni Tools’ oil‑pressure/pre‑luber adapter is engineered for professional and DIY enthusiasts working on GM Generation IV/V V8 engines. Replacing the OEM EN‑47971, it installs quickly in place of the spin‑on oil filter and converts the port to a 1/8″ NPT connection—perfect for attaching oil pressure gauges (e.g., GM‑21867) or preluber systems. Built from hardened steel, it delivers reliable, accurate diagnostics and can be used for engine pre‑lubing before startup to prevent dry starts. Compatible with popular models like Corvette, Camaro, Tahoe, Silverado, and more, this adapter is a smart investment that enhances maintenance efficiency and protects your engine.