Do you have an aftermarket DP?
Yep
Which brand?
VRSF 3"
Why?
I bought it to extract more power and to complement my JB4 
(and maybe a little bit for sound...can hear those turbo's more prominently now)
Do you get a drone with it?
Nothing major with the stock exhaust.
Lastly, Are you happy with the purchase?
Does the pope shit in the woods?
Is there a way to remove CEL error code without a tune?
I had the DP's installed the same time i had the JB4 installed...so cant really answer that one.
Do you get alot of gargles? or pops??
i only get it when decelerating in first gear. Had that before the DP's were installed though...but again, might be abit more prominent now after having the DP's installed
I was also looking at the DP combo with a Remus Quad Exhaust later down the track. Haven't been in a car that drone's before, so cant tell yet if i'll be ok with the slight droning
