Upgrading Your Mazdaspeed 3 Exhaust Manifold
If you're hunting for more power from your DISI MZR engine, swapping out the factory mazdaspeed 3 exhaust manifold is one of the most effective ways to wake up the turbo and get things moving. Let's be honest, the stock piece isn't exactly a masterpiece of engineering. It was built to be quiet, reliable for the average commuter, and cheap to manufacture. But if you're reading this, you probably aren't the "average commuter," and you likely want your Gen1 or Gen2 to breathe a whole lot better than it does right now. ...