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- Either the heads or manifold to determine proper manifold width
- Comes with front & rear presicion flanges, 2 sets of flange orings (1 for 1.600", 1.700" ports and 1 for 1.800" ports) and one telescoping device for measuring
- Designed to fit, engineered to last. Rivera Primo performance and aftermarket parts for Harley-Davidson motorcycles
- Rivera Primo - American made pro clutches, belt drives and other custom parts for V-Twin motorcycles – Whatever it takes to keep your V-Twin bike on the road!