just bought a used 03 w 10000 mi aem srs, michelin alpins, dope cf shift knob, and it rips. iam a former z32 enthusiast.

 

Have the dealer check it. Sometimes they can tell and sometimes not. If you have a way to log timing and AF ratios you could also make a good assumption.

 

DON"T, DON"T go to the dealer, they will void your warranty, if they find out you where flashed.

 

Dealers can not tell if its flashed on the 03 and 04 cars

One way to tell would be to log the OBDII data and see what rpm the rev limiter activates at as most reflashers use a higher rev limit. Don't rerl on your tach - they are not that accurate. Also logging the ignition timing can tell you if you know what you are looking for.

05 cars its easy to tell

If you send it in to me, I will tell you for free if it has a flash in it or its stock. You pay shipping.

 

what makes it so easy on the 05s

 

Just push in the clutch and rev to check for the lower rev limit (5k?)

 

EDIT: send it to al and pay the shipping that is your best bet

 

The dealers can't tell? What ever happened to the guy who went to the dealer with your flash and they detected it?