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The Ultima® billet rocker box is the perfect way to set your engine apart from others. With a unique CNC machined design and chrome plated 6061 billet aluminum, this box will enhance the look of any engine. The Ultima® box uses a patented reed assembly to vent all 1992 & later Evolution® engines. Unlike other designs that can degrade in performance with time, our reed assembly is made from fatigue resistant stainless steel that will give you consistent, trouble free performance for as long as you ride your bike. Ultima offers two versions of this box. The standard box offers classic looks with the versatility to fit any stock Evolution® or custom engine. Our compression release box comes with all the features the standard box does, plus the added feature of being compatible with the S&S electric compression release system. Both box sets come with all required mounting hardware and gaskets.
PVC Reed Assembly (88-515)
88-515 Compression release compatible Note: Above boxes sold as set of two boxes.
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EL BRUTO Big Inch |
| >> 100" ENGINE << |
| >> Long Blocks << |
| >> 113" ENGINE << |
>> 120" ENGINE << |
>> Long Blocks << |
>> 127" ENGINE << |
U L T I M A E N G I N E S |
>> 80" ENGINE << |
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>> 96" ENGINE << |
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>> Cylinder Heads Big Bore << |
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>> Cam Cover & Cam Shafts << |
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>> Billet Rocker Box << |
>> Ignition Line << |
