The new belt drive system from Ultima was made for '91-05 Dyna models for Twin Cam and Evolution setups. The backing plate is made from 6061-T6 billet aluminum and claims to keep your bike balanced due to its lightweight construction. You can also choose the outboard support option. Ultima | www.ultimaproducts.com
Zipper's Performance Five-Speed Transmission Trap Door
Using the original Bisagno design, Zipper's now produces these transmission trap doors that are CNC machined from billet aluminum with heavy-duty double row bearings for strength and shaft alignment and support. The new trap door assembly is made to fit '87-06 five-speed big twins. Zipper's Performance (410) 579-2828 | www.zippersperformance.com
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