Also you can check some scrap guys behind Al futtaim next to al falah plaza opp Abu shagara (shj used car market).
Go behind al futtaim and ask scrap guys shops its little further behind like 500m - 1km and all scrappy there bring lot of japanese cars parts and half cut.
my nissan GT-R was a gift from dad and i am very happy with the car but recently i had got it service and soon after that there was black smoke coming out of the exhaust which is a big concern if they have used a compromised product for the car.
when i checked with them they said it will go off in a day or two
it that so or i need to act fast before it causes any major problem
please help