Nissan Skyline GTR (BNR32) '93 - upgrade exhaust for all bumpers

Can you add the ability to change the exhaust on the BNR32 through an upgrade? without the rocket bunny kit you can make it bigger with one of the bumper upgrades but you can’t when the Rocket Bunny kit is applied or if you want to retain the stock bumper. I would love to see the ability to change the exhaust while keeping the stock bumper like you already can with the MK4 Toyota Supra.

(BNR32 exhaust with the Rocket Bunny kit)

(Exhaust upgrade we have for the MK4 Supra)