S&S Cycle 07-16 BT Gear Drive 640G Camshaft Kit

If you're looking to build a big-inch Harley-Davidson engine that makes serious horsepower, the S&S Cycle 640G Gear Drive Camshaft Kit is a solid choice. This kit is specifically designed for engines 95 cubic inches and larger, aiming for that 3,000 to 6,000 rpm powerband where you'll feel the difference. It's engineered to work with a compression ratio between 10.5:1 and 11.5:1, and it's intended for use with stock oil pumps, simplifying the installation process.

The 'G' in 640G stands for gear drive, which means this kit replaces the stock chain drive system with a more precise gear setup. This gear drive setup offers improved timing accuracy and reduces the potential for chain stretch or wear over time, contributing to a more consistent engine performance. The kit includes the camshafts themselves, complete with inner gears already installed, along with the outer cam drive gear kit and a comprehensive camshaft installation kit, so you have the essential components needed for the job.

Keep in mind that to properly utilize the .640 lift these cams offer, you will need to source special valve springs that can handle the increased lift and duration. This kit is intended for performance builds and is not CARB approved, meaning it cannot be shipped to California. If you're aiming for a noticeable increase in horsepower and a more direct power delivery from your engine, this S&S Cycle kit is a well-built option.