Edelbrock Four-Window Power Valves, 5.5 Hg 13155

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 13155 opens at 5.5Hg of manifold vacuum which is slightly sooner than the 4.5 Hg factory spec on VRS-4150 carburetors.