Mongoose exhaust swap

I've got one for cat back...
I'm never going to use it.. Got it from bob
It's a 3 1/2 tip still got plenty of life yet

Just wanna swap something... Love swaps

Bov (blitz or hks) air filter.??
Standard parts welcome

Sorry to jump on your swap thread but what exhaust you running ?

Nothing at the moment as starting with a shell and will be running front exit when done...

Rear bumper has been flushed in so gunna leave it alone as been done well