hi all i need help .
lately i jus changed my turbo.and immediately after that i realize that my exhaust seems
significantly louder than before.i understand that sometimes swopping of turbos
might have slight...
as i gonna dohc-ing my head to 4g93.so i think of make it become red.1st of all,should i take the head to spray then only put on or i should wait after the mech modded it then only i spray?
and can i spray it on my...