Our 3” exhaust system for the Prado replaces the entire factory exhaust system, including the dump pipe off the turbo. It gives some good gains, particularly bringing the turbo boost in much earlier, adding responsiveness down low in the rev range. In the interests of keeping in-cab noise as low as possible, we incorporated two straight-through mufflers into the exhaust system.
This keeps the exhaust noise level close to the factory levels, with no annoying drone inside the cab. The mandrel bends and straight through mufflers on our Prado exhaust system, ensure the highest possible flow, and along with that comes maximum performance and fuel economy.