Now you can let your engine really breathe. The stock throttle body and manifold restrict airflow, robbing power from modified engines with large displacement and/or high-flow heads. With this 57mm straight-bore Throttle Body and high-flow manifold, you can increase horsepower big-time in Delphi fuel-injected Harleys®. All stock components are reused and will bolt onto the Throttle Body without any modification. Our Throttle body is designed with the stock Delphi air cleaner bolt pattern so it will accept any H-D® or Küryakyn air cleaner. It even allows you to retain your factory cruise! We also offer a version of our Wild Things™ Throttle Body and Manifold for applications using S&S cylinder heads or other cylinder heads with 1.800" intake ports. The manifold has been machined for improved flow and port match in these applications.

Fits: All '01-'05 Twin Cam Models with Delphi Fuel Injection.

NOTE: Softail models required fuel supply tube, P/N 441, sold separately. Touring models require spacer kit, P/N 442, sold separately.

Some larger than stock engines use taller cylinders than stock. P/N's 455 and 456 are designed for these applications that require a wider intake manifold. The design allows for trimming to length for your particular application.

IMPORTANT: As with any performance product, tuning is essential to achieve maximum gains in horsepower and torque. Stock or aftermarket ECU re-mapping is required!