The engine bay looks stock .But the car sound is deep for a diesel actually I know my accord sound.And the turbo you can hear at around 2500rpm it's like charging up and if you keep there unbelievable boost coming up till 5000-5500rpm after loose all power that in second gear in 3rd gear 6000rpm loose the power so I don't know down pipe maybe bigger and has a little turbo blow sound in the exhaust everything looks stock.i think I have to take the car to a map shop.