The one in the ebay link is the same as the one i have, it is on a 307 but mine came off a late 406 with the air dozer as part of the egr system( the little flap at the end ) my 306 is a late one so has the air dozer as standard so will be a straight fit.
It doesn't close off specifically the intercooler as on a late 306 they have the air dozer and no intercooler, it closes off the intake charge a little making the car use more of the recirculated gases from the egr.
It doesn't close off specifically the intercooler as on a late 306 they have the air dozer and no intercooler, it closes off the intake charge a little making the car use more of the recirculated gases from the egr.