I have a 2002 quad cab 4x4 5.9, CAI, Magnaflow exhaust. which would be better the long or shorty headers for my truck. Plan on changing out cats too while I'm at it. Thanks in advance..

 

Try checking in the 2nd generation forum as those guys have more knowledge of the 5.9 than those of us in the 3rd gen as we are only really used to the 4.7 and the 5.7 liter.

Also, I would go with long tubes.

 

It is hard to find honest dyno tests of headers on engines
but as rough estimates
you can count on about 2-3% horsepower gains
when shorty (9-20 inches primary) headers are in front of muffler and catalytic converters
and about 4-5% horsepower gains when long tube (32-39 inch)
headers are run with no mufflers or catalytic converters.

It is also worth noting
that when Steve Dulcich dyno'ed 38 inch long tube TTI headers
on a 5.9 Magnum V8 recently
in Spring 2007 Engine Masters magazine
he found no gain below 2500 rpm
and most daily driving is in the 1500-2500 rpm range.

more info

https://dodgeforum.com/m_724162/tm.htm

http://www.moparmusclemagazine.com/t...ust/index.html

 

one thing to consider, most shorty headers will bolt right up where as with long tube you'll have to do some customizing.

 

I like your pic Hanson... nicccceeeee

 

everybody loves it... thats why its there

 

It is not news that headers usually give no HP gain at low rpm...
Loss of low end torque is also typical.

 

i was told true duals with out headers will do that and with headers it will give you what you want again

 

ditto ^^^