915 muffler

No, the 915iS muffler features a completely different design.

The 914 Turbo is not the same as the 915iS.

Thanks.

Since the characteristics of the turbocharger of 915 and 914 are different, do you mean that it should not be installed even if the shape of the mating surface is the same?

The 915iS muffler is specifically designed for the engine. We have no data on how the 915iS muffler might impact the overall performance of the 914 engine since it has never been installed and tested.