Autometer GM Mechanical 52mm 0-35 PSI Boost Gauge Short Ram Intake System uses DCF350 Filter A stepped drill bit works

A stepped drill bit works well for doing this

5L / 02-07 Altima Secret Weapon Intake

2002-2003 Ford Explorer Eddie Bauer 1996-1998

sound and taste to your Accord with this Takeda cat-back system

Autometer GM Mechanical 52mm 0-35 PSI Boost Gauge Short Ram Intake System uses DCF350 Filter A stepped drill bit worksMechanical 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.