If you've fitted a new rear diffuser, you need to uprate the cat-back.
If you don't, the wankel flange trumpets on the new diffusion layer outbreaker will cause tappet grind and destroy your big end.
Just keep going on in that vein for a few hours and I'm sure she'll cave in...
Not sure about new tips for the existing cat-back.
If you don't, the wankel flange trumpets on the new diffusion layer outbreaker will cause tappet grind and destroy your big end.
Just keep going on in that vein for a few hours and I'm sure she'll cave in...

Not sure about new tips for the existing cat-back.