World Products S/R SBC Cylinder Heads Accepted For Super Stock

World Cylinder Head SR BareNHRA Super Stock competitors running small-block Chevrolet engines in their machines can now take advantage of brand-new cylinder head castings from World Products instead of scouring junkyards to locate a set of factory castings.

In an effort to allow competitors to use current-day, durable products, the NHRA Technical Department has added the S/R cylinder heads to the NHRA Accepted Products list for use in the class.

There are three separate versions of the casting that have been approved, all cast from high-density iron alloy to provide strength. World has also designed the product with extra thick decks and screw-in rocker studs, saving the racer the expense of having those installed.  The cylinder head is a bolt-on replacement for the factory cylinder head and, according to the company, is far more durable and robust than the factory design, which is known for being crack-prone.

World says the small-chamber head is perfect for 305 cubic inch engines; there are three part numbers approved for competition at this time.

World Products NHRA Super Stock-legal cylinder heads:

  • PN 042650-NHRA, 170cc Intake Port, 58cc combustion chamber
  • PN 043600-NHRA, 170cc Intake Port, 76cc combustion chamber
  • PN 043610-NHRA, 170cc Intake Port, 67cc combustion chamber

The cylinder heads are made right here in the good ol’ US of A using the latest foundry techniques and ISO 9000 machining facilities and practices.

For more information on World Products, check out their website.

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About the author

Jason Reiss

Jason draws on over 15 years of experience in the automotive publishing industry, and collaborates with many of the industry's movers and shakers to create compelling technical articles and high-quality race coverage.
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