STD Development Company - world's strongest aftermarket Harley-Davidson engine components.

Specializing in complete high performance Big Twin engine assemblies, aftermarket
Harley-Davidson cases, high
performance heads and
related engine components.

For over 20 years STD Development has been setting the standard for the world's strongest aftermarket Harley-Davidson cases, high performance heads and related engine components. Whether you are looking to replace the stock parts on a modified street engine, or building a nitro burning big bore drag bike, STD builds what many professional builders rate as the toughest, highest performing replacement Harley components on the market.

Located in Chatsworth, California, STD was founded by owner Lou Trachtenberg in 1975. A specialist in race car engine building who also had a passion for Harleys, Lou saw the need in the Harley market for much stronger replacement Harley cases for use in high performance applications. His new company was started by designing, building and offering the first ever complete set of replacement H-D cases. Their first application was an Alternator Style Engine Case for 1970 and later models, followed by 1949-1969 Generator style cases, then 4-Speed Transmission cases and Alternator/Generator Engine cases.

In 1989 STD expanded it's product line into performance cylinder heads, first with a Pan/Shovel Head. The next year STD introduced their Evo Heads, then in 1991 their high performance Shovel Heads. STD Heads are the top rated heads on the market, offering a 20-50% power increase compared to stock heads. New for 1998, STD is proud to offer Inner Primary covers for both Dyna FXR's and Softails as well as a complete Sportster Case assembly.

All STD products are cast from the highest quality aerospace alloys, have the highest rated tensile strengths and offer unsurpassed strength and reliability when it comes to Harley replacement heads and cases.

For 1999 STD has utilized its over 20 years of knowledge and experience in building the sport's finest aftermarket Harley-Davidson performance components, to offer its own line of STD Complete Performance Engine Assemblies, Drive Trains, and Transmissions. If you're building the ultimate performance oriented street custom or racebike, STD development is the first place to start.

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