Re: Extractors - XF
Extractors might give you a tiny bit better fuel economy, but you probably wouldn't even notice it much. The cat is what give's you more fuel economy, and the muffler aswell. My muffler is straight through, which also gives more economy again.
As for power difference... hell yeah. If you've never driven an XF with extractors, then you'll definetely notice the difference when you get them.
87' XF FREAK!