Nitrous Oxide 0.500 Blue Billet Square Bore Perimeter Injection Spacer Plate These hex head style valve

These hex head style valve cover nuts from Speedmaster make valve cover installation and removal easy and hassle-free

Includes spindle

Speedmaster EGR adapters can resolve some mounting interference with valve covers or carburetors on some applications when using these manifolds

They fit carburetors with 5 1/8 in

Nitrous Oxide 0.500 Blue Billet Square Bore Perimeter Injection Spacer Plate These hex head style valveThese Speedmaster perimeter plates employ multiple injection points to ensure that a perfectly atomized, cylinder to cylinder balanced blend of fuel and nitrous reaches your engine. The technology eliminates nitrous delivery imbalance, the major drawback with spray bar type nitrous systems. The plates are manufactured from aluminum and are anodized for protection.