YDR & RAT 2 Fat Rat Tri-Gain Mod

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This mod works with the YDR (You Dirty RAT) (Which is Made in the USA BTW) and some of the RAT 2 (USA Production) ProCo pedals and according to a client I just spoke with my mod also works on the New Turbo RATS, but always open the pedal up and check your pcb against the pics here. Proco is notorious for changing their circuits. The really cool thing about this mod is there is virtually no difference in the PCB Layout of the YDR and the RAT 2 that I offer a mod for.

IMPORTANT – Your RAT 2 must have a pcb that looks exactly like this. If your RAT 2 doesn’t look exactly like the one in the pic this mod will not work with your pedal. So please do not e-mail me and ask if it will. I will not be offering any RAT 2 mods except for the one I offer here. But, for those of you wanting to try my RAT 2 mod I suggest you buy a new or used YDR (You Dirty RAT) and perform this mod on it.

The only difference between these two pedals (YDR & RAT 2) is the clipping diodes, which I replace in the mod anyway. So, after the mod, the two pedals will be exactly the same. Let me say right off that I am well aware that the new production RAT 2s are now made in China. The problems with these Chinese production pedals are well documented. The quality of the parts is very poor and I do not recommend you try to mod them. There are instances where the pots have simply fallen apart. The YDR and the RAT 2 I offer a mod for here are both made in the USA and the quality of the parts are very good and will stand up to the modding process very well and they are True Bypass! I absolutely love my modded YDR and RAT 2.

They are, by far, one of the best OD/Distortion pedals (post mod) on the market at any price point. My modded YDR and RAT 2 will do overdrive and distortion and all points in between. It will even do a Clean Boost! I have added bass, flattened the mids and also added focus to the gain. The mod will give you this very warm and FAT sustain. There’s a slight mid boost that helps you cut through a mix, for both recording and live performing. NOTE – As far as I know there is only one YDR pcb layout in existence. But, ProCo is known for changing the circuit in their pedals at the drop of a hat. So I highly recommend taking the battery cover off and looking inside to make sure your YDR or RAT 2 looks exactly like this. If they do not, this mod will not work with your pedal. BTW, this mod is a little different than my first RAT 2 mod.

Hear For Yourself! (.mp3)

RAT 2.mp3 — 
FAT RAT 2 Sound Samples – Played entirely through a ProCo RAT 2 modded with our Mod Kit. Played on A Strat through a 2000 Fender Hot Rod Deluxe amp mic’d with a SM57. All of the Tri-Gain positions were used when making this mp3. Both Single Coil and Humbuckers were used. Notice the clarity and dynamics in the mp3. This distortion is unlike any other we sell. Incredible clarity and dynamics with this mod!


LED Color

Blue, White, Green


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YDR & RAT 2 Fat Rat Tri-Gain Mod
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