This past weekend I installed the de exhaust, before the install i had either the stock exhaust or hood stack. stock exhaust\21cm housing it would run up to 1550*s and climb if i would of let it, smoke would blow for 3seconds roughly then clean up. fuel psi would drop to around 2 or 3

Put a hood stack on with a 16cm housing and it would blow black smoke for roughly the same amount of time and clean up egts dropped about 100* at wot and crusing, fuel pressure dropped the same.

put the De kit on and now it blows a thick dark cloud for quite awhile (not sure never really timed this one but is alot darker and alot longer) and egts stayed about the same as the hood stack only now i'm pulling fuel down to 0psi at wot, fuel filter has been changed 8 months ago but only has 300miles put on it with fuel treatment and cleaner ran in the fuel.

Did the exhaust really make that big of a change? or is it coincidence

 

Must've been a coincidence