Mazda BP 1800 Miata head gasket 94-05
Suitable for 85.5mm pistons
OEM Mazda gasket is .031 for reference .030 version will not affect compression ratio or squish
Thicker gaskets reduce compression. Consult your professional engine builder to determine CR with your head and crown volumes.
Coolant passages are identical to Mazda 94-00 gasket.
NOTE: Can also be used with 01-05 BP6D head but we suggest a coolant reroute if this combo is used.