Yeah, I’ve been chewing on that idea too. The deep rumble in an exhaust is a rich source of low‑frequency content, but you have to capture it cleanly and then sculpt it. Start with a high‑pass filter to cut out the unwanted dirt and then use an equaliser to tame the raw booms around 80–200 Hz. A light compression can bring out the punch without crushing the dynamics. For the sub‑woofer, you’ll need a unit that can handle the torque and a bit of resonance; a 12‑inch can work, but keep the phase alignment tight so you don’t get a muddled soundstage. Once you’ve got the envelope in place, layer the harmonics to create a bassline that feels alive. It’s all about balancing the raw power with subtlety—over‑processing turns a killer soundtrack into a headache. If you test it in stages, you’ll see where the imperfections creep in and can fix them before you go all‑in.