Oil Restrictors Dart/ Chevy SHP 5pr .090 Hole

The Oil Restrictors Dart/Chevy SHP 5pr .090 Hole by ALLSTAR PERFORMANCE is a precision orifice restrictor designed for high-performance engine lubrication systems on Dart and Chevrolet small-block platforms. These restrictors are essential for tuners and engine builders who need to control oil flow to critical engine components, particularly when running modified or race-prepared powerplants. By managing oil delivery rates, these restrictors help prevent bearing wash-down, maintain proper oil pressure under load, and protect internal engine components from inadequate lubrication during extreme driving conditions.

Each restrictor in this five-piece set features a precisely machined .090-inch orifice hole, manufactured to tight tolerances that ensure consistent oil flow characteristics across your entire engine's lubrication circuit. The standardized orifice diameter allows tuners to match flow rates to specific bearing clearances, cam lobe designs, and rocker arm requirements—critical variables in forced-induction or high-RPM applications where factory oiling paths prove inadequate. These restrictors install directly into oil passages and feed lines, working quietly and reliably without requiring electronic controls or complex integration into existing systems.

Mechanics and engine builders working on Dart, Chevy 283, 327, 350, 383, and 427 small-block engines benefit most from this restrictor pack during cam shaft upgrades, turbo conversions, or supercharger installations where stock oiling can no longer support modified engine demands. Installation requires basic familiarity with engine assembly and understanding of your specific oiling schematic; these restrictors are typically placed at rocker arm feeds, pushrod galleries, or main bearing oil ports depending on your build's requirements. The compact 4.4 x 2.3 x 4.8-inch package keeps five restrictors organized and accessible in your toolbox or engine-building workspace.