DISCLAIMER
Use of the word
Harley-Davidson ®, various model names and designations are provided soley for reference and application information. None of the products appearing on this website are licensed, manufactured, sponsored or endorsed by
Harley-Davidson, Inc.
STD Development, Inc. is in no way affiliated with Harley-Davidson, Inc.

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STD Development
High Performance V-Twin Engines & Components
Specializing in complete High Performance Big Twin engine assemblies, transmissions, primary drives, aftermarket engine cases, high performance heads and related engine components for the Harley-Davidson market.

For over 25 years STD Development has been setting the standard for the world's strongest aftermarket cases, high performance heads and related engine components for the
Harley-Davidson ® and American V-Twin market.

STD is now proud to offer the sport's premier high performance Big Twin Engine and Drivetrain Assemblies, complete, ready to install and run. 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 components and drivetain assemblies on the market. Applications are available for Twin Cam 88, Evo, Shovel, Pan, Sportster and Buell models.

Real Performance! Low Customer Direct Pricing!
• STD 88ci Engines, in Pan/ Shovel and Shovel Head styles, Complete HERE
• STD Big Twin 97ci Engines, in Evo style, Complete HERE
   These are blueprinted, race spec quality 110+ HP street engines ready to bolt-in and ride!
• STD Complete Drivetrains (Engine, 5-Speed, Primary Drive) from HERE
   The finest quality, best performing, complete and ready to ride drivetrains for custom builders.

New Hot Products!
• STD FLT Transmission with stock, 1/2 or 1 inch offset mounts for super wide rear wheels New!
• STD 4.25" - 4.50" Big Bore High Performance Engine Cases New!
• 1941-1969 High Performance Replica "Retro Classic" Engine Cases New!
• STD High Performance Heads. Bolt-on 10-25% horsepower. New!!
• STD Big Twin Performance Custom Rocker Box Covers New!
• Mikuni's new HSR 48mm monster Racing Carburetor! Bolt-on 10-25% horsepower. New!

Click to learn more about STD and founder Lou Trachtenburg