Gt4 718 tubi

[petersafc]

Anyone fitted the slip on tubi? Really fancying one

[F12DDE]

I would also be interested to see if anyone has done the backbox, I saw a video of the full system on Youtube and it sounds insane, but that includes removing the particulate filters, so need to remap the car. Something I wouldn't be looking to do.

[petersafc]

Another option possibly a milltech which is a little cheaper