Hey I'm sure they're is many threads out there with swap options for the Mazda 3. But for me I need clarification as to which engine can fit perfectly and has more horsepower and something I can build up as well. I wanted to put a turbo onto my current engine but upon reading many threads that wouldn't be wise lol. So my problem is that many threads only focus on the speed3 and those cars are nice and all but I have a sedan not a speed3. So this is where clarification is needed for me. All help is very much indeed appreciated. I know for other swaps out there you can buy swap kits but I'd take it that doesn't exist for this Mazda? I hear fusion engine and duratec and Miata engines but too confusing as too which options would give me the best horsepower and torque. I am trying to build a beast. for a sedan that is not speed3 which everyone does.