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Silica Technology* provides up to 11% more durability compared to previous generation (3)
Provides a high-level of dynamic performance by maximizing cornering grip and traction while providing remarkable durability and resistance against cuts and tearing
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Ball bearing pivot increased rigidity and reduced free play
DYNOJET Recalibration Jet Kit - Big Twin/Sportster 8105 FSBK Performance Exhaust Silica Technology* provides up toRecalibration Jet Kit Big Twin Sportster Include the jets, needles, instructions, etc. necessary to recalibrate stock engines with CV carbs, Recalibrate your stock Keihin CV carb to make full use of the performance potential, Kits provide broad range performance gains and maintain stock driveability, Made in the USA