ThunderMax EFI throttle bodies, manifold and High Flow air cleaner assemblies provide the big airflow required for larger performance engines. These oversize CNC-machined castings replace the factory designs used on Delphi®-equipped 2001 and later models, and are designed to accept the factory electronic components so assembly is a snap. The ThunderMax High Flow air cleaner includes a beautifully CNC-machined billet back plate, a 2 3/4" (7 cm) deep high flow filter, breather plumbing and heavy-duty support brackets. An 8" (203mm) diameter air cleaner cover, such as our ZPN121183, must be ordered separately.
2001-2005 Twin Cam models
Throttle body and manifold are sold separately but must be used together. Throttle bodies are available in 50 and 54mm and require the special ThunderMax air cleaner. Manifolds are listed for stock and most popular stroked High Performance engines in your choice of standard 1.625" (41.3mm) internal diameter or oversize 1.780" (45.2mm) intake port options. Manifolds for other cylinder lengths are available upon Special Order.
2006 to present Twin Cam models
Throttle body and manifold are a 1-piece unit construction and for use on cable throttle models. They do not work with the so called "Fly-By-Wire" throttle system as used on 2008 and later Touring models. Kits require the special ThunderMax air cleaner. Kits are listed for stock and most popular stroked High Performance engines and feature oversize 1.780" (45.2mm) intake ports. Kits for other cylinder lengths are available upon Special Order.
Note: 4.937" cylinder length is stock on 88 and 96 CI Twin Cam and Twin Cams with Screamin' Eagle 95, 96, 103, 110, 113 and 120 CI kits, as well as on Jims 120 CI engines.