Extra heavy duty rubber cap rated for a long service life with heated pressurized coolant. Don’t trust cheap parts store vacuum caps that will fail and leave you stranded!
All Toyota model 2ZZ’s come with 2 of these caps from the factory. Lotus models do not have the caps; they have a hose that loops from one location to the other. The loop tends to rub on other components and fail; it can be replaced with two of these caps.
Can also be used to block the breather fitting on the 1ZZ throttle body when installing a turbo or a vented breather can. Correct size for replacement of 1ZZ cylinder head outlet pipe which is capped from the factory on MR2-S models.
Approximately 16mm ID