Boss 302 rear diffuser to gt500 diffuser

[rsb213]

Anyone know if I need to do any additional bumper cutting if I'm switching from the boss 302 rear diffuser to the gt500 rear valance? I'll be swithing to corsa quads and I already have the boss diffuser.

Thanks.

 

[Lemonth]

I just did the switch on my car from Boss to GT500, no additional cutting needed if you followed all the lines and slots in the Boss 302 diffuser. I did mine with the bumper still on the car, but it was a huge pain.