$100.00
See if it's really the one
Search with this product to compare it, find similar styles, or turn up something better before deciding.
from the Harley Road race craze we have learned that the HD M8 motor needs and wants to breath more, a lot more! that's why we opened up everything in our breather assembly. double the dia. of industry norms. creating more air flow and less restriction includes 4 ft of .250” id breather hose Oversized Brass fittings featuring a .247” inner dia. stock hd Head Breather Bolt .09” inner diameter vs Boom Box Breather Bolt .192” inner dia. vs Boom Box Breather Bolt .192” inner dia.
Have a question about this?
We currently ship within the US, with more countries coming soon.
Final cost and dates are confirmed at checkout.
🇺🇸 Ship from USA · On Agora since 2026
$100.00