Autometer Factory Match GM 2-1/16in 35 PSI Mechanical Boost GaugeMechanical boost gauges have become the staple in boost pressure monitoring for all types of engines, gasoline, diesel, or otherwise. Ultra precise bourdon tube meter movement ensures accuracy and durability not seen anywhere else in the industry. A simple 1 8? NPT pressure connection requires no electrical hookup for operation. Includes 1 8? NPT fittings and nylon line kit. This Part Fits: Year Make Model Submodel 2001 2005 Chevrolet Silverado 2500