Hello all,
Can someone pinpoint the main exhaust bottleneck for a 2001 Dak QC with a
4.7? After doing a lot of reading (here and elsewhere), I seem to be running
into 2 or 3 differing points. One the one hand, many seem to suggest a new
muffler will really free up the exhaust. One the other, I have heard that a
new muffler wont do much because the main bottleneck is at the cat. And then
on the 3rd "hand", I have read that if you dont replace the stock 2.5" pipes
with a 3" catback, neither hi-flow muffler nor hi-flow cat will help. And I
guess to round it all out (4th hand), I've heard that the 3" pipes will rob
you of low end torque, which is what you need for towing and the like
correct?
If it makes a difference, I dont use the truck for towing. Mainly for
driving to work and around town and the occassional day trip. No racing,
other than the normal youthful exuberance on the freeway or at the light.
Basically, I am not looking to build a mean street rod or anything, just a
truck that can sh*t and git if I tell it to.
I dont want to spend money for the same thing 2 times, so I want to make
sure I do it right the first time. I just ordered a Z-tube last night and if
I can figure out what's best I hope to get some exhaust work done this
weekend. I'd like to use stock pipe if possible and avoid getting a whole
new catback system until later on.
Also, is it correct that the 4.7 Dak's have 2 cats? Like a pre-cat and then
a main cat?
Thanks in advance!!
-adam
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