Pedals that stack with the Dunlop Zakk Wylde Wah

Electro-Harmonix Green Russian Big Muff

Feed a high gain signal into Electro-Harmonix Green Russian Big Muff and it comes out closer to mid-forward

Shin's Music Dumbloid

Shin's Music Dumbloid pushes a high gain tone toward tight

Free the Tone Future Factory FY-1

Put Free the Tone Future Factory FY-1 after Dunlop Zakk Wylde Wah in the signal chain, clear of Dunlop Zakk Wylde Wah's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Horizon Devices Flux Echo

Put Horizon Devices Flux Echo after Dunlop Zakk Wylde Wah in the signal chain, clear of Dunlop Zakk Wylde Wah's own gain stage — goes in the amp's FX loop (or last, into a clean amp)