You would have to get them custom fabricated and you would have to relocate the catalytic converters and O2 sensors by moving them back.

 

are there any real benefits in getting headers if you use the stock cats and "Y" pipe connected to a free flowing catback system or would the gains only be realized by going true duals? and what are the claimed gains?

 

I don't think you will see real benefits on a stock 4.7L by going to headers. I think Spintech cats and a better Y pipe or even true duals are the best way to go. If you go boost or nitrous then you would see benefit from the headers.

 

Thanks, people have said the stock manifolds are pretty free flowing for being stock. No need to replace them just for the sake of saying "I have headers"...

 

It all really depends on what the original cast manifolds are like, on my 93 they are a log shape piece of poo! This style of header is the cheapest for the factory to make and is a reason to why they were commonly use, and I can only imagine that almost 20 years ago they didnt know as much about tuning exhaust as they do now.

Shorty style headers (similar to log style) are a step up from stock and will show minimal power gains the majority of the power gains showing up in the top end of your power curve which isnt good for any type of truck unless its being drag raced.

Long tube style (Full Length) are the best you can get for a truck as it will produce power increases in your low to mid range power curve which is what all trucks want (same reason why truck engines are cammed different).

Equal length runners dont really matter too much in this situation because there is little to no exhaust overlap, and no turbo charger so there is no need to make them equal length, all this does is space the exhaust pulses which would help combat harmoic resistance from resonance allowing a turbo charger to spool faster and such engines like a rotary which have high exhaust overlap to run better.

Hedman Hedders has some applications for the 4.7L as well

Non-Coated: 79570
HTC Coated: 79576

 

This picture is from the Ram 4.7, but the setup is almost identical to ours.

stockmanifolds.jpg

 

Eimer, that is the exact same setup, lol. I think the stock manifolds are junk, the headers will flow better but what I'm saying is you really won't see a difference with just headers. The most restrictive parts of our exhaust are the cats and factory "Y" pipe. Just look at it, lol.

 

Just like an animal at the zoo, stare at it and study it. haha

 

if i go high flow cats with a highflow exhaust system would i need it reprogramed?

 

Nope, check out Thunder's thread who did the same thing in the G2 Dakota section.
https://dodgeforum.com/forum/2nd-gen...pic-heavy.html