so which lt headers will give my 2007 ram hemi 4x4 the best hp and tq gain im not worried about price im just lookin for the best power gain, thanks

 

Pacesetter long tubes will give you +33TQ and run ya about $700, not including install. They're some of the best around.

 

When I got mine, I had the opportunity to see recorded dyno's at my local performance shop. The Dynatechs posted the biggest gains, but the Pacesetters were a close second and I could get them and have a local shop put an awesome ceramic coat on them for less then half what the Dynatechs were uncoated.

 

Wow, those are pretty sharp looking!

 

What's the extra small tube on the front passenger side for?

 

It lines up with a small hole in the block, I never gave it much thought when I installed them but I'm thinking it's EGR...

 

Hammer,

How was the install on a 4x4? I'm looking at the pacesetters lt's also, and was wondering how much of a problem it would be to relocate the cats and pipes around the trans.

 

Not bad at all if you can weld. I made it harder than it needed to be because I originally was going to omit the cats and do the non-fouler trick, but found I lost a bit of low end torque, so I went back a couple days later and had to cut & weld the cats back in. Took care of the little bit of backpressure you need for the low end.
I already had an aftermarket cat back, so basically you unbolt the exhaust manifold then cut after the cats, taking it off in one piece. The LT's will extend about 16-18" farther back, so you can hold the cat up and see where you need to cut the pipe to weld them back in. Then get some wire and shrink tubing and splice the O2 sensor wires so they'll reach the rear bungs. No problems, no CELs after 2 years.
You just need to check and re-torque the headers bolts occasionally, I do it when I change the oil. I've had no real problem with any loosening much, maybe one or two may need a quarter turn.
Most important thing is when you install the headers, tighten the bolts (don't go crazy with the aluminum threads in the block), then run the truck for about 20 mins, letting them get as hot as they'll get, then (being careful not to burn yourself) hit the bolts again.
Pull the front fender well guards off when you do it, you can get to every bolt through the tire wells...

 

Thats what I was hoping to hear. I'm saving up for headers, hopefully in the next month or so I'll have them.

I was worried about not having enough length between the headers and transfer case to fit the cats.

 

thanks for the advice, what do you guys think about putting in a cam instead of headers or am i better off getting the headers