After a lot of research i don't see any other long tube headers better than Dynatech Supermaxx on the market today for a 5.4 3V 4X4. Expensive but very good quality, also comes with 2 high-flow cats. Let me know if i am wrong guys.

 

From what I understand our trucks don't respond well to headers, not to mention the excessive work that goes into installing them. They looks like a quality kit though.

 

Don't respond well for short-headers. Those are long.

 

I'm getting some of those. I think they enjoy a great reputation, especially iof you have a s/c.

 

trilogy is working on a set of mid size headers and high flow cats, not sure when they will be available.

 

What is the difference if the truck is supercharger ot not ?

 

More air in, more air out. Simple equation. Those longtubes are the best performers in the Lightning world. I don't know if our N/A trucks would benefit enough for the $1500 and several hours installation.

Joe

 

I can't imagine that Longtube Dynatechs with hi-flow cats wouldn't give the truck another 8-10 horsepower MINIMUM. As for "excessive work"- there is lots of room under there.. try headers in a Mustang!

Dynatechs are used in the LS1 Camaros/Firebirds/Vette with good success, there is little difference between the modular 5.4 and the 5.7 LS1.. not counting internal "pushrod" stuff.

 

These are the best available for the 5.4 3V. I have spoke to several who have installed them and they are very very happy with the results..

 

Are those things CARB Legal? Actually...will the truck pass smog with those on?

 

Yes, didn't you see the 2 cats on it ?

 

CARB certification and able to pass a smog sniffer test are two VERY, very different things - just ask Roush regarding their S/C. As far as there being more room than a Mustang, you're high! The passenger side is tighter than tight to get anything in there. If you really want the most out of them, you might try dyno'ing it before (tuned preferred) with A/F and then again after. You might see that you want it re-tuned...but you're not going to see much of any gain without a tuner on any headers plain and simple. That setup definitely looks top notch, if you got the coin burnin' a hole in your pocket, hook em up! They're quite expensive though...that's exclusivity for ya, but it's a complete system up to the catback so that's nice.

 

Trilogy's OE's Dynatech's long tube's. We have a set on the Trilogy Harley SC... They're awesome.

 

In the actual instructions it says, "Curse, scrape your knuckles, slap your wife and get back to work." Well, something like that. If that doesn't scream difficulty...