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Boundary Engineering Standard Flow Oil Pump (NA/NB8A 1991-2000)

  • Sale
  • Regular price $575.00 AUD
Includes GST

IMPORTANT: Boundary pumps are NO LONGER SUPPLIED WITH A CRANK SEAL. Please purchase the suitable NOK JAPAN oil seal from our shop.


- Standard Flow Pumps DO NOT fit the SVT 00-04 engine
- Standard Flow Pumps will fit all NA6 (long nose), NA8, NB8A 
- Pumps come shimmed with 60psi shim. If you require any other PSI please order the shim kit in addition to the pump


Boundary Engineering Oil Pumps are trusted world wide and known for their quality. Made in America. If you are building an engine, you can trust this pump!


Stage 1 - Standard Flow
Stage one pumps utilize a factory housing, and have our gear set placed inside in order to strengthen the pump.
All parts under go ultrasonic, air blast, and hand inspection.
Gear set is cut in house from 4140 chromoly steel billet.
Parts are blue printed and issued with specification sheet.


Shim Kits
Miata pumps can now be shimmed in the comfort of your very own garage. This shim kit includes all 5 shims, and a brand new cotter pin.
Shims are precision cut to the bore size to prevent rocking during operation.
Shims have laser etched the oil pressure each shim will create.*
*The actual pressure your engine makes depends on many factors such as oil cooler, thermal valves, clearances, oil viscosity, operating temperature, other parasitic losses such as turbo chargers, or superchargers which bleed from the main oiling system as well as the blocking or use of piston oil squirters. Listed pressures are a theoretical value.


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