SKU: ALL 90072
UPC: 848238042443
MPN: ALL90072
The ALLSTAR PERFORMANCE Oil Restrictors Dart/Chevy SHP 1pr .090 Hole (SKU ALL 90072) is a precision engine component designed to regulate oil flow to the main and rod bearings on small-block Dart and Chevrolet SHP (Super High Performance) engine platforms. These aluminum restrictors use a .090-inch orifice to meter oil delivery with tight tolerances, preventing excessive bearing wear and maintaining proper lubrication pressure under high-RPM racing conditions.
Machined from lightweight aluminum with a natural finish, this pair of oil restrictors features allen head mounting for secure installation and straightforward service. The .090-inch hole size is calibrated for engines running high-capacity oil pumps and aggressive cam profiles where uncontrolled oil volume can exceed bearing requirements. Proper oil restriction prevents bearing runout, reduces parasitic drag, and stabilizes oil pressure across varying throttle loads. Installation requires proper torque specification and confirmation that the orifice size matches your engine's pump output and bearing clearances.
This component is essential for engine builders and racers tuning small-block Dart or Chevrolet SHP blocks for competition or high-performance street duty. Whether you're running a fuel-injected pump-gas engine, a naturally aspirated carbureted build, or a supercharged application, correct oil restriction prevents hydraulic lock, bearing distress, and catastrophic engine failure. These restrictors are supplied as a pair and replace OEM restrictors on applicable engine blocks.
Proper bearing lubrication is non-negotiable in high-rpm applications. Too little oil starvation kills bearings; too much creates unnecessary drag and pressure buildup. ALLSTAR Performance oil restrictors deliver the precision metering that separates a reliably tuned engine from one headed for catastrophic failure. Verify your pump's gallons-per-minute output and your bearing clearances before selecting the correct orifice size for your build.
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