I just installed a HKS High Power exhaust.
On my test drive I noticed it pops quite a lot under deceleration almost like a lean misfire in sound. It also feels that if anything it may have lost power.

Any thoughts? Do I need to reset computer etc?

 

the pop is normal

 

Cool. Was considering an accessport as next purchase, so can tune it. But if normal I dont have to rush out and get one.

 

No CEL, no need to reset. Popping sound is practically normal and HKS is powerful enough to have that pop.