MXR 78 distortion. As the name implies this pedal nails all of those dirty, distorted 70's sounds. From Ramones to Judas Priest and everything in between. : r/guitarpedals
The MXR Custom Badass '78 Distortion | Vintage Guitar® magazine
Guitar Pedal X - News - MXR releases the 5th in its Badass Series - the MOSFET-based M249 Super Badass Dynamic Overdrive