I'm in the process of getting headers. I cannot locate any dyno sheets. The only one I can find is the JBA and it is a 14hp gain. Now I have an 08 and the options are very limited.

TTI for $1400
Dynatech $1400
Edlebrock Shorties $600
JBA shorties $ 600
Kooks $1600.

Is it really worth the extra for the long tubes than going with shorties and a better y-pipe. Please help me here guys!

not a direct answer to your question,but,does Doug's(tri-y's) or Thorley's (tri-y's) make a header for the 08's? I beleive they are in the $600-$800 range. Also,I have JBA's on my 04-I got 10-12 hp+tq at the rear wheels before final welding and a custom y-pipe. I believe the JBA's could(kind of)be considered mid's.

Marc, here's a Thorley tri-y dyno on a Mega Cab (note drivetrain loss close to 37%). Gains for the '08 engine should be comparable to the results for any post-2003 HEMI. Figure rear wheel gains around 24 ft-lbs / 30 hp for a 4x4 QC.

I believe Pacesetter also makes longtubes for the '06+ models. Summit Racing has them in painted only: http://store.summitracing.com/partdetail.asp?autofilter...091+115&autoview=sku

Here's Dynatech's

http://www.afabcorp.com/AFCO_Dynatech_USbrake/merchant....ch&Category_Code=ram

Peak-299hp/304tq The peak power should be pretty similar 03-08, but the gains over stock will be different. Don't know about 07-08, but they said the 06 has a really nasty, mashed up merge on the stock Y pipe compared to the 03-05, so it would show a larger gain over stock.

Didn't see the second part of your question. I have seen quite a few posts (since I joined last September) where guys mentioned they were swapping out their shorties for long tubes. That and the cost and headaches of piecing together a system, where the main factors that helped me decide to go with longtubes.

If the price for the shorties is $600 just for the header and you buy a new Y pipe (a guess $200-$300+?) 02 bungs ($??) and piece it together you are already $800-$900+ into it, not to mention the headache of trying to get the different products to fit together and not leak.

If you can afford it, why not spend the extra and replace the whole front of your exhaust with a better flowing/performing system that's custom built for your truck, have less installation headaches and it's all stainless?

Freeze-That parasitic loss on that Megacab is sick.

'03-'05 HEMIS also have the same restrictive OEM y-pipe as later years.

quote:

Freeze-That parasitic loss on that Megacab is sick.

Yes, yes it is.

quote:

'03-'05 HEMIS also have the same restrictive OEM y-pipe as later years.

I heard for the 2006 model they hired the head night breakroom janitor from Chevy's high performance street and engineering dept. It might have been the same guy who developed the 40 rwhp bolt on rear wing.

Actually they are very similar, but Dynatech said it was changed for the 2006 model. Of all the Y pipes they have seen, they said it was about the worst. I wish I had a picture of mine. It looked like a giant crimping tool was used on it and made one of those C crips and almost closed it. You look at the pipes coming in and going out and wonder how anything gets through.

Is the trans and rear axle the same on a megacab?

The 1500 Mega Cab uses the 2500 frame and axles.

I've never been to a dyno but my long tubes and full exhaust did knock .4 seconds off my 0-60. I think that's pretty damn good. According to superchips I'm running 6.6 now.

This message has been edited. Last edited by: Starchief_59,

If you look at the Dynatech graph, the peak gain isn't all that great. However, their average power increase is close to the peak gain across the entire RPM band. Long-tubes will sometimes show a power drop at low RPM with other engines, but not with the HEMI. The Dynatechs show no low-end loss and a substantial torque increase at high RPM. Given the 1 3/4" primaries, they should be able to support all the airflow mods you can throw at them (bigger cam, CNC'd heads, FI, etc.) I just wish they weren't so damned expensive, but I guess the gains should be similar for other long tubes. Pacesetter anyone?

What about Pacesetters that almost everybody uses?

i prefer hedmans, it all depends on your tailpipe size, collector size, primary size. the bigger the collector and tailpipe the higher up the power band will be, i am running a 3" ORY right off of my headers how often do you need torque on the low end, id rather have my powerband in the mid to upper RPMs, with my mods im doing 0-60 right around 5.9 seconds with a dynomax bullet,the perfect gas mix, and good traction, alot has to do with the superchips, resistor and Sharadon Valvebody, as soon as i shift from 1-2 i gain about 6MPH in a blink of an eye..

My point exactly guys if a JBA dyno shows 25 hp and similiar torque and the Dyna's show less why the extra $$$$.

So if I bought JBA's or Edlebrock shorties and a JBA ypipe and have the system in for under $800 why would we spend the 1400 on long tubes?

I don't understand why our headers cost so much anyway. They're so cheap to make I don't get it. That's why I went with the pacesetters. I wouldn't pay 1400 for headers ever.

It also depends on the year of your truck. I think there were only 2 choices for 2007s.

quote:

My point exactly guys if a JBA dyno shows 25 hp and similiar torque and the Dyna's show less why the extra $$$$.

So if I bought JBA's or Edlebrock shorties and a JBA ypipe and have the system in for under $800 why would we spend the 1400 on long tubes?

What you are describing for $800 are shorties and a Y pipe, not a system.

quote:

I don't understand why our headers cost so much anyway. They're so cheap to make I don't get it. That's why I went with the pacesetters. I wouldn't pay 1400 for headers ever.

You are comparing apples to oranges.

-Buying the $600 shorties listed above you are basically replacing your exhaust manifold. With a new Y pipe you are replacing the last 12" or so of the front half of your exhaust. Everything in between is still stock. To do more than just throw on shorties you are starting to "piece together" a "system" and all the possible installation headaches, future leaks/craked welds and expense that could go with it. It's worked out great for some, been a nightmare for others.

-The $1400+ are a longtube SYSTEM. It replaces from the block to just past the Y pipe (LT headers, high flow cats, mid-pipes, Y pipe, o2 bungs, o2 extensions, hardware, all stainless, ect. It's engineered specifically for your vehicle to deliver the best performance and ease of installation with little modification if any.

-JBA's site shows 263hp/318tq peak and Dynatech 299hp/324tq. One represents replacing basically the manifold, the other, the front half of the overall system.