yes it is a v8 and it is dual exhaust. I only want to use muffler and resonator. The two headerpipes/downpipes from the 350se meet before the resonator, so theoretically i could attach the back half of the 300sd exhaust to these pipes if i had some kind to a coupler that would adapt two pipes to one.

Timevalve is a manufacture for custom exhausts for europeans cars here in the USA. Unparalleled quality... "exact" factory design/specs except they use stainless steel.