Growing up in an automotive enthusiast family, it was only natural to follow suit. HalfFast Performance is a bit of a play on words of course, but the idea is simple. Have fun. Our roots are deep in the Mopar world, and have grown into the Late Model Hemi scene over the past 15 years, now including G3 Hemi swaps into legacy vehicles making them more powerful, reliable, and of course more fun.