718 GT4/Spyder/GTS 4.0 Exhaust OAP (OPF/GPF delete)

[Ayton1]

I have had the OPF’s replaced on my gt4 by ninemeister as part of their upgrade package.
I am now really happy with the sound of the car & the fact you can operate the valves properly via the switch is a big plus.
When I bought it it had a straight through sports exhaust fitted with no valves & the drone for me was terrible & you didn’t even gain a better sound because of the OPF’s.

[AMZEY1]

Is that their stage 2 package you had installed, so remap, GBP delete pipes and BMC filters ? do you feel an increase in power too, as its supposed to give 40 odd bhp increase ?