Airbox Cover Oval and Powerfilter-Kits
The standard air filter can be replaced with relatively little effort itself against a Thunderbike product. If it’s just a matter of putting an accent on a design part, our TÜV-certified air filters and airbox covers are the first choice!
Airbox-Kit Oval
Our oval air filter can be combined with various Thunderbike covers and is suitable for all Twin Cam models with throttle by wire. The base plate is equipped with a filter element that makes the conversion from a round to an oval filter a breeze.
The Thunderbike Airbox Cover Oval are suitable for combination with the oval original air filter of Milwaukee-Eight 114 cui models (Softail & Touring) or our Air Box Kit Oval for a 107cui conversion.
Powerfilter-Kit
Thunderbike Powerfilters are the perfect allround-aircleaner for all Harley-Davidson models. All are EU street legal / TÜV-approved up to Euro 4 and also tested in combination with Dr. Jekill & Mr. Hyde exhausts. By a minimal modification you can turn it into a real Race Filter, that boosts your horse-powers after ECM calibration (not for road use).
The disassembly of the series part is very simple and requires no further instructions. The required mounting material is included. For installation, the original bleeder screws are reused later.
In the original filter is an electronic throttle, which is controlled by the ECM (Electronic Control Module). Instead of the connector, the dummy is plugged in, which supplies the controller with the right signal and prevents an error code from being set. This is included in our EFI kit, which must be ordered separately for injection engines. For carburetor engines it is not needed.
For the subsequent assembly of our design filters, only the existing holes and threads are used. The new bracket is attached with the existing engine bleed screws. The adapter ring, also supplied, is placed on the holder and the ventilation hoses are attached. Then comes the new base plate and everything is fixed with three screws on the throttle body. The new design housing is screwed onto the base plate with the included K & N filter element.
After one hour, the screwdriver’s work is completed.
The Thunderbike air filters are prepared so that the air passage corresponds to that of the factory filter. Consequently, no further modifications to the EFI control need to be made.