The interior sound is absolutely 10/10, the most authentic interior sound of an lfa I've ever heard.
The exterior would be 7/10, it surely captures the distinct sound of lfa, yet at higher rev range it sounds quite, let's say, plastic.
https://www.youtube.com/watch?v=F0m6dvpK4m8
You can compare the real recording with yours and see what you can improve. I'd say this link itself is a decent looping sample already, there are some nice backfire sound as well.