I kinda have this stupid question for someone. before I put the exhaust on my truck it idled around 700, now it idles about a needle width above 500, I know with the different exhaust theres less restriction, but why would it lower the idling rpm, It kinda bothers me

 

Try cleaning the MAF sensor and throttle body.

 

that was done like maybe 2000 miles ago if I'm not mistaken

 

Not sure why its different but my truck always has been about 500

 

As stated above ~500 is normal idle rpm for these trucks. I wouldnt worry about it.

 

my truck is about 500 with the A/C on and 650-700 without. i've got True Dual custom exhaust FWIW.

 

I suppose aslong as it doesn't shake and make funny noises I shouldn't worry about it, I just thought the average idle for these trucks was around 700 thats all