I changed those things...
Oil: Mobil 1 Synthetic
Filter: K&N High Flow air filter ( silencer removed 3 days after i got the car )
Spark plugs: Didn`t change them.
Exhaust is the most important mod for me... i wan`t a beast sound

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Btw someone told me that i lose back pressure or something like that if i get dual and that i should stick with single exhaust... i never heard of back pressure so i`m asking you guys if that stuff is true
