Power Valve Block-Off Plug

The Advanced Engine Design Power Valve Block-Off Plug is a precision-engineered solution for engine builders and performance enthusiasts looking to eliminate secondary air injection systems or modify emissions control architecture. This compact plug serves a critical role in custom engine builds where OEM power valve systems are being bypassed, disabled, or replaced with aftermarket alternatives.

Manufactured by Advanced Engine Design with attention to dimensional precision, this block-off plug is engineered to seat securely in standard vacuum line ports without requiring modification to intake manifolds or cylinder heads. The compact profile—measuring just 4 inches in length and 0.75 inches in diameter—allows for easy fitment in tight engine bay configurations while maintaining a professional appearance under the hood.

Its lightweight construction (0.06 lbs) ensures zero impact on engine balance or weight distribution, making it an ideal solution for street cars, race engines, and restoration projects alike. The design prevents vacuum leaks that would otherwise trigger check engine lights and compromise air-fuel ratio calibration on fuel-injected systems, benefiting anyone looking to enhance engine performance.