Big gains from ARH Headers on JLT's 5.0

[Tucker]

393 was stock exhaust manifolds, cats, 3" cat back, JLT CAI and tune
415 was all above with added ARH headers and ARH cats.

Hope that helps

 

[19COBRA93]

That does help. So the gains could be shared between the headers and the X pipe, correct?

 

[Tucker]

The car did have an X with the cat back (forgot to mention), so only changes were high flow cats and headers

 

[mixxer]

Sounds good tucker! We have 6 or 7 sets of headers in stock ready to go. Just give me a ring. KENT

 

[wbt]

Curious....has anyone compared an off-road x-pipe or high flow catted x-pipe with stock headers to a full long tube setup?

My guess is there wouldn't be a whole lot of difference.

 

[Tucker]

Your not going to gain 25 RWHP from no cats or high flow cats, 10 maybe.

 

[wbt]

Your not going to gain 25 RWHP from no cats or high flow cats, 10 maybe.

I wanna say Lethal got 15-18 RWHP from their off-road pipe which would put the ARH gains only 7-10 above that. $299 vs. $1,500.

My instinct seems to wanna save the $1,200 and invest in another area like head porting, drive line, etc....

 

[GrnBullitt08]

Nice Gains....the dynomax systems are pretty damn loud. I ran a 3" catback for sometime and it was a little too much for me.

 

[SD07GT]

I wanna say Lethal got 15-18 RWHP from their off-road pipe which would put the ARH gains only 7-10 above that. $299 vs. $1,500.

My instinct seems to wanna save the $1,200 and invest in another area like head porting, drive line, etc....

correct 14-16 is what I have seen down at the shop ...also to note a bassani race axle back piced up 2-3 hp also ....skip the headers and use them for F/I only ...just my $.02

 

[wbt]

correct 14-16 is what I have seen down at the shop ...also to note a bassani race axle back piced up 2-3 hp also ....skip the headers and use them for F/I only ...just my $.02

That is my thought process atm.

 

[luillo]

I wanna say Lethal got 15-18 RWHP from their off-road pipe which would put the ARH gains only 7-10 above that. $299 vs. $1,500.

My instinct seems to wanna save the $1,200 and invest in another area like head porting, drive line, etc....

damn man, you got me thinking about that. If headers are only 7-10 over the Lethal off road X and you save about 1200 dollars that is way too much. If is no other benefits from header over x off road then i will forget that... Mybe get them later for the looks only i guess.

 

[levelbelow2000]

How much difference would there be in RWHP if u used a off-road x-pipe with the long tubes vs. the x-pipe with high flow cats? Results should be more RWHP.

 

[mixxer]

Dont compare peak horsepower,but under the curve where you really drive the car.

 

[akula52]

Headers

I have heard reports from a reliable source that power was lost with a header swap and went back to the OE?? It will be interesting what other shops get? To be fair, I don't know who's header it was!

 

[Boorail85]

How much difference would there be in RWHP if u used a off-road x-pipe with the long tubes vs. the x-pipe with high flow cats? Results should be more RWHP.

Im willing to bet you gain 3-5hp without the cats.. but you might drop 5+ft/lb of torque as well.

Dont compare peak horsepower,but under the curve where you really drive the car.

exactly, an I am willing to bet that a car with longtubes vs a car with only an o/r x will show great gains throughout the 3000-6000rpm range. might only get 7-10hp peak to peak gains at 6500ish, but the longtubes will fill out the entire power band and the car will accelerate harder.

 

[mixxer]

BINGO!

 

[GeorgeInNePa]

The only way to know for sure is back to back runs with the O/R X and the LTs.

 

[wbt]

Im willing to bet you gain 3-5hp without the cats.. but you might drop 5+ft/lb of torque as well.



exactly, an I am willing to bet that a car with longtubes vs a car with only an o/r x will show great gains throughout the 3000-6000rpm range. might only get 7-10hp peak to peak gains at 6500ish, but the longtubes will fill out the entire power band and the car will accelerate harder.

Pure speculation ATM. Until there is a back to back test on the same car, same dyno, same conditions it is all heresy. I personally know an individual who has run 11's with stock shorties and an off-road Magnaflow x-pipe. That was in 2500' DA.

 

[zilla8]

I'm curious to see the diff in numbers for a catted longtube car vs stock manifolds with highflow cats like my set up.I have'nt dynoed my car but I can tell you it runs really strong with the combo I have.

If I was going to race my car I would probably opt for the longtubes,
but for mostly street I doubt I will see much difference from a car with the same exhaust with the only difference being the longtubes.

I think for this car you will see gains from replacing the stock exhaust with a good 3" catback, highflow cats and X-pipe that are atleast equal to longtubes.If I planned on doing more then CAI/tune I would get the longtubes for sure.