“First it’s liter then stock n bigger in diameter n cooling vents are bigger too it definitely boost better n runs very cool once moving with a ktuner stage 2.1 flash and looks very aggressive 5 star rating it’s much more expensive when stock one cost $100 new but it’s very much needed if you are looking for more hp n torque cooling on any engine is key for Proformance and durability longevity of engine”