The black PTRLHDShit Happens Knock Knock t-shirt is a unique piece made for car enthusiasts who appreciate humor and aren’t afraid to admit that sometimes… shit just happens.
Made from 100% high-quality cotton with a weight of 210 g/m², this shirt combines durability, comfort, and style. The fabric is soft, breathable, and built to withstand regular wear, while its substantial thickness ensures it drapes well and doesn’t show through.
This t-shirt is entirely self-produced, which means we control every step of the process — from design and print to stitching — to deliver a product that’s crafted with attention to every detail.
The Knock Knock graphic refers to a familiar scenario among tuning fans: too much power, a piston bends under pressure, and… knock knock – the engine starts knocking because something went seriously wrong. It’s a humorous take on one of the most dreaded and expensive tuning failures, instantly recognizable to any true petrolhead. The print combines technical inside-joke with ironic humor — a nod to those unforgettable garage stories.
The "Shit Happens Knock Knock" model is perfect for car meets, garage nights, or as a bold everyday shirt that gets noticed and sparks a laugh. It also makes a great gift for anyone who's into cars and knows the difference between “stage 1” and a blown piston.
Let your passion for cars show — with a sense of humor, but serious quality.
