[9524tee]

my s13 sohc , ran a 15.8, stock with a header , injen intake,stock piping , into a n1 muffler, i made a air scoop for the intake which helped alot the mouth at the opening was like 8 inches in diameter, sucked in alot of air... i ran this time with the passenger seat out and the spare tire, with all of that i ran 16.5 ...