Weapon-r Race header/de-cat

[dustylax]

Here are the basics and some pictures, there was no official thread for this header so i'll just start one so everyone can search to see how well they do.



8-9whp gains over stock with stock everything else.



15lb net weight loss over stock header and cat




I have dyno'd over and over on the same car after thousands of miles and the car only made MORE power, no power loss over time or miles. The ECU does not tune it out. You will need the Weapon-r anti-fouler in order to not have a CEL, but the answer is yes you will not have a CEL if you have the anti-fouler.

[exarkun1178]

great clear this up for me, my friend who has it had nothing but problems, fitments and cel's do you know cars that did not have fitment problems, and are there many that do not have cels?

[elise/europa]

I saw that headers at reasonable price. Since Forcefed are not supplying anymore theur header, it can be interesting but:

1- I really have trouble to imagine long life without flexible between the headers and the muffler on flexible engine support like the Lotus have.
2- The joint is not fully tight, and can be a source of none accuracy of the oxygen sensor for a close loop system.
3- And of course, it is not possible to weld the exhaust to be certain that the joint will be fully tight since the headers will not be removable easily, or rear frame removed easily.

The shape look good, but those point look for me not enought perfect to install it on my car without modifying the headers my-seft to meet my needs. It is bad, the price is very good. I don't know...

[dustylax]

yes i have heard of fitment problems, nothing major tho, usualy the bend isnt a complete 180 and it takes a little muscle to just work in the muffler. it has been addressed and will be corrected on the next batch of them (i spoke directly with the person who created them about it).

CEL's- no, not one single issue, this is something i find hard to believe on most cars if everything is done correctly using the weapon-r anti-fouler, not any other ones. If there was a cell after that then i would look into other things that might have caused it.

[jim-clayton]

I'm very impressed with my WeaponR header. Nice design and quality.
The flange is nice and thick, the welds are perfect. The price is more than
reasonable. It also has a "de-cat" built right in. Saves another $300.00.

[andrewgotanelise]

Yah but charlie says they are bunk w/o a retune. the debate will never end!

[dustylax]

anything on any car is not a great idea to change unless you can tune for them...the largest thing is when you get rid of a CAT is that you will just run leaner than his tune, not just this but any setup, so yes you'd want to get a tune for it or any other car w/o a cat. On an all motor car the AFR's have been pretty good for what i have tested but i havent run any supercharged setups w/this header on the dyno to know how it changed AFR's.

For all motor guys i still think this is the best bang for the buck.

Supercharged i would have to say i dont know because i havent done it myself first hand to give a good answer so i'd rather just say i dont know till i try it....hopefully i can try it soon on something im working on.

[HJZ]

Throwing my two cents in. The header has been great to me. CELs did come on a couple of times initially but after a few hundred miles it no longer happens. I now have logged at least 3,000 miles (and thats an unestimation if there ever was one)on the car. It's been on since Feb of this year. I just don't remember the exact mileage. Anyway, it's a great product for the price. The increases are certainly there. Aside from the dyno, top post is my chart, real world experiences from a friend of mine when we did a little comparison one night, he said to me "what did you do to the car? I can't keep up any more. Take it for what it's worth of course.

[Westrock]

Have had mine for a couple months, had a check engine light come on after about 1500 miles, but then went back off maybe 500 miles later and hasn't come back. As far as catalyst, I am thinking about modifying the Arqray to have a catalyst where one of the 2 muffler cylinders is. Easier then modifying the header with all its bends.

Car back fires and pops alot more or rather alot more pronounced, can even make it do it when I want.
Dyno in sig does was before header.

[Westrock]

Just wanted to update on this product. I have had no real issues as far as cracking or anything like that. The header has been on for about a year, and I only did one track event last year (rented out Hallet in Oklahoma for a day).

Only thing that really stuck out was I had to use a dremel on one of the manifold flange stud holes cause it was just a hair off center. The uhhhh, "B-Pipe" that connects to the muffler is slightly larger diamater then the stock exhaust and so I had open up the slip fit on the Arqray exhaust and it was a damn tight fit, but its worked. So not sure how a stock muffler or any other brand would fit.



I am currently taking it off and going back to stock header cause I'm installing a VF kit and the car will have plenty of power and I am getting tired of the no catalytic smell. The ECU has thrown no CEL's since that initial one I had in the last post. I have had a wide band installed the whole time and everything seemed ok. The engine would wander every so often during idle as the AFR's would go between about 12.0 and 17.0 (at idle only).


I will say that unistalling and installing this header is 100x timer easier then the stock piece.....Im currently hack sawing that damn unused EGR pipe on the stock header

[dustylax]

thats good feedback, thanks for following up after this amount of time.

[jim-clayton]

Originally Posted by Westrock

Just wanted to update on this product. I have had no real issues as far as cracking or anything like that. The header has been on for about a year, and I only did one track event last year (rented out Hallet in Oklahoma for a day).

Only thing that really stuck out was I had to use a dremel on one of the manifold flange stud holes cause it was just a hair off center. The uhhhh, "B-Pipe" that connects to the muffler is slightly larger diamater then the stock exhaust and so I had open up the slip fit on the Arqray exhaust and it was a damn tight fit, but its worked. So not sure how a stock muffler or any other brand would fit.



I am currently taking it off and going back to stock header cause I'm installing a VF kit and the car will have plenty of power and I am getting tired of the no catalytic smell. The ECU has thrown no CEL's since that initial one I had in the last post. I have had a wide band installed the whole time and everything seemed ok. The engine would wander every so often during idle as the AFR's would go between about 12.0 and 17.0 (at idle only).


I will say that unistalling and installing this header is 100x timer easier then the stock piece.....Im currently hack sawing that damn unused EGR pipe on the stock header

A for effort! I would sell my car if I had to install the stock exhaust. I think water-boarding would be more pleasant.

[dustylax]

i'd really like to see some logs of before and after on the supercharged cars, i dont know how lean people are running already but i was under the impression that the tune should compensate/adjust for any change in AFR's ?

[Demonized]

Originally Posted by dustylax

i'd really like to see some logs of before and after on the supercharged cars, i dont know how lean people are running already but i was under the impression that the tune should compensate/adjust for any change in AFR's ?

There usually seems to be a loss if not tuned by it, after the ECU has learned.