Boundary Oil Pump - 91.5 - 05 Miata

The Boundary BP oil pump starts with a fully torn down and inspected housing. This housing is then assembled with our billet oil pump gear and sealed. This pump also comes with the option for a high-flow billet backplate for those running over 7000 RPM consistently.

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.
  

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.

Product Fitment:
Stage I - BP-S1 Fits: Mazda Miata 1991.5 – 2000 (Long Nose Crank) - NOT RECOMMENDED FOR VVT MOTORS 2001-2005
Stage II - BP-S2 Fits: Mazda Miata 1991.5 – 2005

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