Boundary 91.5-05 Ford/Mazda BP (All Types) I4 Oil Pump Assembly (2 Shims - 72 PSI / w/o Crank Seal) - BP-S2

Stage II pumps increase the overall flow by machining a deeper pocket into the oil pump and fitting larger gears in this pocket. This increases the strength of the pump, increases mid-range oil pressure, and increases the strength of the oil pump gears.

The Stage II Pumps have these additional modifications:

• Larger gears are fitted into the oil pump which increases mid-range protection and ensures compatibility with VVT.
• The pump is shimmed increasing maximum warm pressure from 60 PSI to 70 PSI.

All assembled billet pumps undergo the following:

• Pump is completely taken apart, all parts undergo ultrasonic cleaning, air blast, and hand inspection.
• Pump is hand de-burred.
• Our industry-leading mirror finished gear set is used
• Stainless Torx heads replace the stock fasteners
• All fasteners are torqued to spec
• Loctite applied to fasteners to prevent back out or loosening
• Anaerobic sealant applied to critical areas to boost pump up speed and reduce aeration.
• Assembly lubricant applied to all critical surfaces to get oil flowing fast on startup
• Parts are blue-printed and issued with a specification sheet.

Part Number BP-S2 FITS:

1. MIATA 1991.5-2005

NOTE: Customers will be responsible for providing their own OEM crank seal before installing.