Got oil ?

[wav399]

Sorry about that mixed up title on the taillight switcheroo.  Now, about spark plugs, do Bosch platinum +4 plugs make a positively effective increase in performance for a N/A 93 S13?  I've read that it does not for the turbos but how about N/A cars? I'm about to get them installed tomorrow.

[PSI240SX]

seriously, if any difference at all happens, you wont feel it seat of the pants, trust me you need to do alot more to the ignition system to feel a difference unless your current plugs are just spent.