after installing headers and test pipes i got this codes and my ses light came on p0430,p0420,p0300. what can i do to correct them?

 

P0430
DTC Name
Catalyst System Efficiency Below Threshold
Bank 2

P0420
DTC Name
Catalyst System Efficiency Below Threshold
Bank 1

P0300
DTC Name
Random/Multiple Cylinder Misfire Detected

This should help you some.
You also may want to try to Search:
p0430 Search:
https://my350z.com/forum/search.php?searchid=8929412

P0420 Search:
https://my350z.com/forum/search.php?searchid=8929421

p0300 Search:
https://my350z.com/forum/search.php?searchid=8929427

 

the one you should be concerned about is the p0300 misfire CEL.

The p0420/p0430 are coming from your test pipes. Use nonfoulers to place the O2 sensors further away from the exhaust stream.

 

thanx man were can i buy that and price?

 

Wow, no flaming? This is refreshing change from the usual noob treatment.

 

There's a guy on here username: Zexy

He makes them and I think he sells them for like $20.

 

check for exhaust leaks also...