Classic Bendix/Keihin Intake Block Spacer! (OEM Shovelhead/XL Ironhead)
Factory references show block spacer use on XL, FX, & FL models 1978-84, but it will work correctly on pre-'78 models equipped with the Bendix and early Keihins. We also suspect use was extended to early carburetor-equipped Evolution models (butterfly Keihin-equipped bikes.) It's purpose is to prevent heat transfer from the motor to the carburetor, and it also provides intake-to-carburetor spacing.