wish that was the case. I use the cruse controll as much as possible expecally when traveling, My speed fluchates way to much if not..

 

seems to be running fine. No misfires or vibrations that I have noticed. How do you check to see if your cat is plugged up?

 

unfortunately, the only way to see if they're broken is to check for codes or cut them off and look... if they're broken, you can take a rubber mallet and tap the outside casing very lightly. you'll hear a distinct rattle if the catalyst is shattered.

 

these triton motors are partial to back pressure, you have to leave the exhaust 2.5 inch diameter if you run true duals (until you get over 600rwhp) or a 3 inch single

 

I am pretty sure that it is 3" all the way back. I didn't change any of that just had the muffler shop put a high flow muffler on it to open it up a little more. Should I go back to the stock?

 

I think that I got it figured out.. i ran Premium gas in it all weekend and the tank that I ran home on didn't have any ethonal in it. Got 15.46 MPG...Think that that maybe the Problem...Hopefully