Conversation Between Darrell@Scoobyworx and Skye 1873

Hi Darrell,
Been recommended to contact you,I have just purchased a 2004 forester sti and awaiting arrival from Japan,looking to change exhaust system but keep the original cat can you explain what pipes I would need after the cat with the rcm 3 inch system I understand they do a resonated centre section and silenced back box.New to Subaru any advice appreciated.
Bob