Type2 bay Twin Port Manifold Boot silicone OEM partnr. 113129729 B
This is the replacement twin port manifold boot for 1300cc, 1500cc
and 1600cc aircooled VW engines from 1970 onward.
These are made from silicone.
If your existing boot is split or perished, extra air will be drawn into your engine causing irregular running.
OEM partnr. 113-129-729B