TP Engineering has the ultimate bolt-on upgrade for Twin Cam® enthusiasts.

Our patented Pro-Vent® Rocker Boxes eliminate the motor oil that gets into your air cleaner and all over the side of your bike. The two-piece design is machined from solid aluminum billet so they’ll also drastically reduce the mechanical noise from your valve train.

Pro-Series® Forged Roller Rocker Arms have outstanding strength and reduce friction by using a roller tip to open and close your valves.

The Scramjet Air Cleaner is just what you need to add some extra horsepower without having to make any other changes. It features a backing plate that includes a velocity stack, a high-quality washable filter element, and a chromed die-cast cover with our unique air scoop. We replaced the stock air cleaner and backing plate on a 2005 Harley Davidson Electra Glide (with Delphi EFI) with our new Scramjet air cleaner. With no other modifications, we measured an increase of 5HP at the rear wheel on our dyno.

Special package pricing is available when you purchase Pro-Vent Rocker Boxes and a Scramjet Air Cleaner. Call now for details.