Ive never heard anyone put kooks on a truck. I know they are good headers, just dont know if they make them for a truck

 

cool, i will go with somthing tried and true anyway.
keep the comments coming. Thanks alot

 

I just has ASM headers put on last week. The stock cats are still there, but they cut off all the pipe that was in front of them, so the flange that bolts up to the headers is welded on literally right on top of the cats. I can take a pic later if you want, but I'm assuming this is how most long tubes work. I got a very noticeable SOTP gain, but I never dynoed the truck before, so I'll have nothing to compare it to when I finally do. Definitely sounds better too

As far as the ASM vs Pacesetter thing goes, the ASM's fit on 4x4's where I don't think the Pacesetters do. But the general consensus seems to be that those two are the best. Check out www.azspeed.com.

 

Brad~ I know that Pacesetters are the hot thing right now. If you want to keep cats, TByrne carries a supermaxx kit that has from the headers all the way to high flow cats. Just another option to look at

 

cool, im going to be doing some more searching and see what i can find

 

Hey, Thunder...not trying to start anything here but I have a REAL hard time believing that the Pacesetters are better than the Dynatechs in anything except price. Not knocking the Pacesetters because I haven't seen enough testimonials yet but I know from experience the Dynatech system installs smoothly and is high quality construction from T304 stainless. Time may prove me wrong on this one, but I think there's a reason the Dynatechs cost more than most of the others.

For the original poster, if TByrne's GP price on these is affordable to you then I'd recommend you jump on them and don't look back!

Just my opinion. to all!

 

No, I dynoed the truck and made 199 rwhp w the 4.8 and hypertech
then I installed the headers and never had it re-dynoed until after i did the motorswap. But i deff felt the difference witht he headers on just the 4.8. I noticed alot more mid-range pull with them. After the swap I put down 312 rwhp. Not bad for a Lq4 with 918 springs, ASM headers and futral tune. i want to throw a cam in to pick these numbers up, but it'll have to wait till i get my car running.

 

im going to look into toms GP,
1, I think with headers and a tune, from what i see i should gain 15 rwhp. now that is conservitive if you ask me, but the few trucks ive seen running 93 octain get tuned from stock, they picked up between 5-18 rwhp! so im sure headers are worth 10 and a tune is worth 5-10 and that should wake the truck up a tad.

 

i heard nelsons tune on the 6.0 is pretty phenomenal, headers + custom tune with no tq management should get that hd moving

 

with it being a 2500hd i tuhk the cats are down the line in the exhaust. right behind your manifolds is all pipe. any of the long tubes will yield good results. i have and love my asm's. i think the pacesetters are the hot ticket since they are about 300 cheaper. you get what you pay for.