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1979-1981 GMC P3500
This is a direct bolt-on kit that requires no cutting or drilling on OEM parts
In recent testing
Coolers have 3/8" barbed fittings and include rubber hose
AutoMeter 2-1/16" Exhaust Pressure Gauge - 0-100 PSI - Ultra-Lite 1969992 1979-1981 GMC P3500One of the most requested line additions in AutoMeter history, this Mechanical Exhaust Pressure Gauge has been engineered to the highest standards of accuracy and durability. Precisely monitor your exhaust backpressure to maximize power and efficiency and ensure turbo longevity. Also ideal for cam tuning, a simple 1 8? NPT connection is all you need for installation. An install kit with 1 4? copper tubing is included and an optional particulate filter
