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Cometic H3115SP40
Cometic head gasket 1.8 BP Miata 94-05
Price: From $102.99 to $119.99

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Detailed Description

Cometic MLS
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. A typical 11.0:1 piston inan otherwise stock chamber volume will require at least 93 octane fuel. Instaling an .060 or thicker gasket will drop that down below 10.5:1 and allow more timing advance for more power. There is such a thing as too much compression.

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.
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