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Moroso Oil Restrictor Kits

When roller rocker arms are installed, along with a mechanical lifter cam, the amount of oil flow required to the valvetrain is greatly reduced. Installing Moroso oil restrictor kits limits this unnecessary oil flow. These kits reduce the power-robbing windage created from the excess oil draining past the rotating assembly and keeps the oil flowing where it is needed most, the rod and main bearings.

4.38 out of 5 stars ( 21 )

$21.99

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$44.99

Allstar Performance Oil Restrictors

Cut power loss from windage with Allstar Performance oil restrictors. They're designed to replace the factory oil galley plugs at the back of the block and restrict oil flow to the top end, forcing more oil to the bearings. The restrictors are available in different sizes for various engine applications.

5.0 out of 5 stars ( 3 )

$15.99

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$35.99

Milodon Oil Flow Restrictor Plugs

Don't let oil go to your head! Milodon oil flow restrictor plugs solve the common high performance engine problem of too much oil in the head area. They restrict approximately 75 percent of the oil to the top end of the engine for better lubrication and prevent oil wastage at the lifters (which will cause windage problems). This also keeps the sump better supplied with oil. These plugs install easily into the back of the block in place of the stock plugs. They're not for use with hydraulic lifters.

1.0 out of 5 stars ( 1 )

$14.95

Engine Works Oil Restrictors

Engine Works offers oil restrictors for a variety of engine applications from the 1950s and up. Machined from aluminum, they fit in most small and big block Chevy blocks (except Bowtie) at the rear of the block. Simply replace the oil galley plugs (tapping may be required). These restrictors are not for use with hydraulic lifters. An oil restrictor installs in the oil passages of the engine block. It limits the flow of oil to certain parts of the engine. Engine oil lubricates and cools vital engine components. In most cases, more oil usually means the engine will run cooler and last longer. However, in some specific RACING applications, more oil can actually reduce the performance of the engine. When roller rockers and solid lifters are installed, the amount of oil required by the valvetrain is reduced greatly. Installing an oil restrictor kit will limit the oil flow, reducing the windage created from excess oil draining past the rotating assembly. This keeps the oil flowing where it is needed most—to the rod and main bearings.

Not Yet Reviewed

$13.71

COMP Cams Oil Restrictors

When building a high performance engine with a solid or solid roller cam, it's necessary to meter the amount of oil going through the lifters and up to the rocker arms. Too much oil to the top will starve the main and rod bearings and cause engine failure. COMP Cams oil restrictors are easy-to-use parts and should be considered when installing a solid lifter or a solid roller camshaft. Simply screw directly into the oil gallery with no machine work.

Not Yet Reviewed

$27.95