Edelbrock Four-Window Power Valves, 4.5 Hg 13145

Description:

Edelbrock 4-Window Power Valves are the latest innovation in power valve design. Internal improvements reduce turbulence for maximum fuel flow, which can now support a pair of PV channel restrictors as large as Ø 0.140 in. each. Four window exit-points distribute fuel more evenly to each main well. The VRS 4150 Power Valve design responds quickly to vacuum changes, which helps to eliminate lean flat spots in accel fueling. They are 100% built, calibrated, and tested in the USA. PN 13145 opens at 4.5 in.Hg of manifold vacuum, which is the factory spec on VRS-4150 carburetors.