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CP Performance Boaters Shopping and Product Info Guide
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Hardin Marine Cylinder Head Gaskets:

hardin marine logoWith over 40 years of marine engine manufacturing experience under their belts building high performance and original equipment engines Hardin Marine has provided the insight needed to develop what today is considered to be the marine industries finest gaskets available today. Dependability and durability in both fresh water and harsh salt water environment.
Marine engines operate in conditions far more severe than their automotive counterparts from cool water rushing against hot cylinder walls to exhaust temperatures exceeding 2,000 degrees Fahrenheit. Rest assured each Hardin Marine Seal and Xtreme Marine Seal gasket was designed for its specific purpose.  While marine seal gaskets are the perfect choice for an OEM application the Xtreme Seal gaskets are strong enough to be chosen by the world's leading offshore engine manufacturers.

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Hardin Marine
Xtreme Marine Seal Cylinder Head Gaskets

xtreme seal cylinder head gaskets

The most demanding sealing job of any marine engine is the sealing of the cylinder head to the engine block, and for that reason we have incorporated the finest gasket core and combustion armors along with 300 series stainless for corrosion protection into our product line. This non re-torque style head gasket is the perfect choice for today's high performance recreational power boater. Sold each.

  • Excellent corrosion protection
  • Eliminate hot spots
  • No re-torque required

Part No. Description
300-17040 Big Block Chevy Gen 4 454 head gasket
300-17048 Big Block Chevy Gen 5 & 6 502 head gasket
300-17042 Big Block Chevy Gen 5 & 6 454 head gasket
300-17020 Small Block Chevy head gasket
300-17030 Small Block Chevy head gasket
300-17068 Big Block Ford 460 Non-Cobra Jet Head gasket
300-17788 Oldsmobile 455 Head gasket

"Competition" Marine Seal Cylinder Head Gasket With "Multi-Layer" Cometic Technology
b/b chevy head gasket

Multi-layer gasket technology has long been a hidden SECRET of the professional ranking Indy and NASCAR racing engine builders. This technology offers advantages not available from any other forms of gasket design. The increased demand for more power has caused increased combustion temperatures, movement between heads and engine blocks under extreme cylinder pressures. By using "multi-layer" technology individual sealing sheets withstand engine loads that until now were never capable of containing. If the very best possible gasket is what you're looking for settle for nothing less than "multi-layer" technology.

Part No. Description
300-17045 Big Block Chevy Gen 4 - 4.500 Bore Head Gasket
302-C5333-40 Big Block Chevy Gen 5 & 6 - 4.500 Bore Head Gasket
300-17065 Big Block Chevy Gen 5 & 6 - 4.625 Bore Head Gasket
300-17075 Big Block Chevy Gen 5 & 6 - 4.625 Bore Head Gasket