right on man, we are basically neighbors. i live right by the johnson county library off 87th st.

 

Area47 does an awesome job. He retuned my truck after i got screwed by a well known tuner (added 2 degrees of timing and called it a day). Runs like a damn champ now. Ill be going back to him again before next summer after i get my heads, cam, whipple, and nitrous hooked up

 

I ran a 4" catback on my truck when it was bone stock w/o a tune and it made a tremendous difference in a positive way. At the time, I was working in deep East Texas and there was a large grade hill coming out of town. With the cruise control set on 70 mph, it would have to down shift going up the the hill when it was bone stock. I did the 4" cat back and zero other mods. That week leaving town, set cruise at 70 mph and pulled the hill with no problem and no downshift. So the loss of "down low power" is horse ****.

 

It's nearly impossible to lose low end power from too big of an exhaust. Having said that, if you just throw a 4" in place of a 3 without tuning, it may affect the Afr enough to "not be in the sweet spot" anymore and make your ignition timing less effective. But with a proper tune, a larger exhaust will make more power. Let's say your engine makes best power around 12.8:1 Afr, you throw the exhaust on and it leans out to 13.1 or 13.2, you may sacrifice torque for peak horsepower. But you retune to get Afr back into the 12.8:1 range, it will make more power. These number are purely exemplary.

 

Can you tell me how much work it is to get the 6.2 catback installed on a 5.3 truck? Do the hangers line up? Just curious if I need to get a muffler shop involved or I can do it in the driveway. I know that I'll need to have them make a final connection since the two pipe sized won't line up, I assume anyway.