Replacement Backing Plates for Stage I, II & Derby Big Sucker

Replacement Backing Plates for Stage I, II & Derby Suckers are constructed from aluminum and feature our patented Big Sucker hidden breather technology. Each hidden breather is o-ringed at the heads and exits at the mouth of the injector / carb to provide efficient engine breathing and a virtually closed looped system. The integrated radius air inlet increases performance by providing unobstructed air flow.
Features
  • Choose from standard aluminum, chrome or black powder coat finish.
  • Fits Stage I, Stage II, & Derby Suckers.
  • Eliminates the need for any external hoses or hardware.
Stage I Fitment:
  • 2008-up FLT models
  • 1999-up Twin-Cam
  • 1993-1999 Evolution
  • 1999-2001 FI FLT
  • 1988-up XL
Stage II Fitment:
  • 2008-up FLT models
  • 1999-up Twin-Cam
  • 1993-1999 Evolution
  • 1999-2001 FI FLT
  • 1988-up XL

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