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Old 12-02-2015, 12:13 AM   #1
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Long tube header question help!

Just opened up the headers I ordered and it's a little Jagged around the holes.. Is that ok? Will the gasket make it ok? Click image for larger version

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They are stainless power headers.


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Old 12-02-2015, 09:38 PM   #2
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On on a street with a N/A motor you may not notice any difference in everything being mismatched. I personally think their quality says worlds about their product and if it were me I'd be sending them back for my money back.
The picture is the last pair of headers I made for my V8 Flathead motor....notice how the flange and pipe meet....no jagged edge or mismatch welding.
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Old 12-02-2015, 11:43 PM   #3
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That's one of the reasons I went with Kooks

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Old 12-03-2015, 04:57 AM   #4
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That is the worst set of stainless power headers I have seen. Don't install them. Send them back.


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Old 12-03-2015, 12:32 PM   #5
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Well I will say this much the flat piece around the holes is dead even. I put a level to it. Then with a gasket I think it will be fine.


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Old 12-03-2015, 06:14 PM   #6
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but why would you pay for something made like that.. really poor quality
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Old 12-03-2015, 08:58 PM   #7
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Its under cut from welding. Being a welder for 20 years its either someone with not much experience or a lack of pride in their work.

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Old 12-04-2015, 08:26 AM   #8
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I ordered bbk ceramic long tubes for Black Friday and I gotta say I was impressed by the quality and the finish. Fitment was also perfect.


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Old 12-04-2015, 09:35 AM   #9
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Quote:
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I ordered bbk ceramic long tubes for Black Friday and I gotta say I was impressed by the quality and the finish. Fitment was also perfect.


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Can confirm. Fitment/quality was perfect with a BBK catted X pipe on a 2011 5.0.


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Old 12-04-2015, 11:22 AM   #10
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I really wouldn't have a problem at all with installing them. BUT... I would drive them to a professional welding shop and get another opinion or two on whether or not it is a cause for concern.
Do all headers have a scavenging point at the outlet now?
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Old 12-06-2015, 12:11 PM   #11
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Wouldn't put those on my car.
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Old 12-06-2015, 06:12 PM   #12
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I really wouldn't have a problem at all with installing them. BUT... I would drive them to a professional welding shop and get another opinion or two on whether or not it is a cause for concern.
Do all headers have a scavenging point at the outlet now?
The point...or pyramid....is usually only used in merge type collecors that are designed for a specific engine, rpm, torque, hp....etc. Although some off the shelf headers may or may not have them itsn't really of any concern on the street. Building headers is very much like designing a cam for your specific car and although off the shelf headers will show a gain across the board custom headers can show as much as 15/20% more torque or HP over off the shelf.
If you have an automatic and have ever had a converter built for you the questions asked before building a custom set of headers are pretty much the same............are custom headers worth the extra money spent.....no.....unless you have a lot of money burning a whole in your pocket. Are they worth the price for a race car...........worth every cent.............NASCAR teams spend upwards of $10/15k on headers for one car.......and maybe just one race. I proved this to myself a couple of years ago by taking my Maverick for a 10.0 car with 1.4 60' times to a 9.80 car with 1.28 60' foot times.........the only difference was the headers.....
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Old 12-06-2015, 06:20 PM   #13
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WOW!
Now, That is how you answer a question!!
Thank You. Excellent.
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Old 12-06-2015, 06:56 PM   #14
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WOW!
Now, That is how you answer a question!!
Thank You. Excellent.
You are welcome! I love to talk/build headers as they are one of my passions. I could talk headers for hours.........for N/A cars anyway.
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Old 12-06-2015, 08:27 PM   #15
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You are welcome! I love to talk/build headers as they are one of my passions. I could talk headers for hours.........for N/A cars anyway.
Aw c'mon olerodder! Was just going to ask you what size kooks headers I should use on my 5.0 with a Roush TVS 2300 supercharger. 1 5/8", 1 6/8", 1 7/8"? ~650 crank hp.
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Old 12-06-2015, 09:22 PM   #16
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Good try but you need to call kooks and lay that question on them....while you are at it......you know Kooks does make custom headers also.....all you need to do is ask them, and be prepared to be sitting down when they quote you the price.
This set of headers was done by Bill Williams of L.A. in 91 for my 408ci Maverick....they were 1-3/4 stepped to 1-7/8 mated to the "ole school" Roush/Yates Trickflow R heads... Chris from SPD in Sacramento changed the collector to a 12 degree merge and a 7 degree transition and my single 4 barrel 408 pulled 650hp @ 6800 and 544lbft @ 5700....before the headers were mod'd by Chris.....as pictured on the left...it pulled 642hp @ 6900 and 530lbft at 5600...........we used three different merge collectors on the Dinan Engine Dyno in Morgan Hill, CA, 12/15/20 degree merge..........and a 3/7/15 degree transition. The 12/7 gave the best results and the most torque.
Moral to this story is that you can teach an "Ole Dog" new tricks.....
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Old 12-07-2015, 11:11 AM   #17
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Dang! That's a lot of info. I think I'll stick to whatever they have off the shelf if I even go that route. Thanks for the reply
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Old 12-07-2015, 06:14 PM   #18
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YEAH! I like the spike. its supposed to create a low pressure, increasing exhaust pulse & velocity output as it heads down towards a Prochaber that additiona;lly creates a much larger low pressure, merging gases, adding some HP increases.
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Old 12-07-2015, 06:33 PM   #19
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YEAH! I like the spike. its supposed to create a low pressure, increasing exhaust pulse & velocity output as it heads down towards a Prochaber that additiona;lly creates a much larger low pressure, merging gases, adding some HP increases.
The pyramid or spike is actually machine cut and hand formed from each individual pipe as the merge collector is built. It works best on N/A motors and as I mentioned above the most compelling reason was to increase torque a little lower in the rpm band and give a little better out of the hole with the transbrake at 5000rpm....it did just that cutting just shy of .2 seconds of my 60' times. When I loosened up the converter I got a little more.............just like buying a canned tune vs buying a specific tune for you car.........custom headers designed for your car can get you a little more HP/TQ if you are trying to stay competitive in racing............my 3cents worth.
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