i have had several header. I have dynod each one as it was on the engine. The first was vibrant 4-1 ceramic coted. My b16 burned off all the coting and made the metal turn into a rainbow colored metal. Then i gave that junk back and got a Stainles DC header 4-1 and the ports on the header were more narrow at the gasket then the engine exhaust ports. As soon as i reved the engine to 9000 the header at the gasket created such back presure that in one day on the dyno i went through 4 gaskets. That went back to the store. Now i have the Stock ITR headr on my b16 and it created more power and nicer sound then all the other ones. The stock ITR manifold is a 4-2-1.
I am how ever in the market to look for a better performing header. And like ZEEMAN said that a header on a N/A engine is very important. If anyone is interested that has a B16 to look for a good header that is a good all around deal Money performance Sound and want to do a group buy i would like to do something like that soon.

 

it probably didn't have the anti-reversions because they don't make them. don't ask me why, but they don't. making over 300hp and spinning upwards of 10000rpm tells me they must be doing something other than looking good. i agree, burns know their stuff, but they don't really make production headers, that is the reason for the high $ on your custom one off header design... $1300 for something you have to put together yourself is pretty expensive imo. i'd rather put some effort into research and development and build a couple prototypes and test them myself to see what works instead of paying someone to do it for me. that is how i learn what works and what doesn't. most people are in the market for something they can buy at a parts supplier, not directly from the manufacturer that they have to weld together themselves. not everyone has that option. anyone can buy a hytech header and that is probably the one mass produced header that is going to make the most n/a power.

 

I'd bet my money on a BISI header if you want the best and most power out of your N/A set-up. SMSP and Hytech are definetly good second place finishers.

 

i need a new wheader for my sir, my dc sux ***.. worst product ever, my flanges are rusted and the header is ready to fall

 

w


whats the collector size on the ITR... i might be interested

 

vibrant j spec 4-2-1 s the best os header in the $450 range

 

anyone have a nice d series header for sale?

 

http://www.skunk2.com/exhaust-2.php?code=EXHMH

SKUNK2 header's coming soon?

 

i know this has been posted for a while now but i just came across it today and want to clear things up here. There is a alot of confusions about turbos. a g might buy u half a turbo setup but do u know much it cost to tune a n/a to turbo. its probably 3 to 5 times more then the the turbo alone just on tunning (ie. dyno, A/F mixture on computer...) Alot of people think... o i can just slap on a turbo for 2gs and i can make xxxwhps. They probably spent more than the turbo alone when problems come up.

As for the header, no matter if u use hytech, jun, mugen... without the engine being modified (cams, tb, air intake, i/m...) it aint goin to make decent numbers on the dyno. From the basics, the the whole exhaust system is to make the exhaust more free-flowing. But what is there to free up when no mods are done to the engine, when u just get the header. yes, u might be able to free up 10hp on a stock motor with intake. i mean wow i doubt u can even feel that on butt dyno. It's a waste of money. It also depends on where you want ur powerband to be at (low,mid or high) thats y there are different headers that comes in 4-1 or 4-2-1. It's just my 2 cents. You don't have to take my word for it. I have been reading alot of articles and i just want to share my knowledge with you guys, just trying to help.

don't be wasting a g on something that u might like temporary, have a goal or plan setup. write down what you are planning to achieve with your car, if you want to drag, or track, or even touge. Where you want the powerband. a header is only a piece of the puzzle.

 

www.bisimoto.com
Obviously you've never heard of my good buddy Bisi??
A header is more then just a piece of the puzzle. The most HP guranteed over any other header on the market! This is the cats *** if your staying N/A!
Just thought I would share this information with you.

 

im sorry....who ever would pay this guy this much is a fool.


$9,059.00
CNC/Portflow competition head with valves and valvetrain
Bisimoto custom spec camshafts
Bisimoto cam gears
Custom Bisimoto spec rods and pistons.
Custom Bisimoto spec crankshaft
Sleeved strutted/braced ductile iron block, courtesy of Golden eagle
Bored, and precision honed (max of 86.5mm n/a and 85mm boosted)
Fully blueprinted and balanced (no platigauge, only precision instruments)
Bearings and thrustwashers included
Meticulous assembly
Includes Torco TBO (break-in oil), and TR-1 replacement oil for dynoing and running, with proper specified weight, for example 5w-30)

total rip off in my opinion.

 

How do you figure??
Guys who pay this much for that type of set-up obviously Race fulltime profesionally for a living.
Bisi is a Honda genius and R&D's all the products he sells.
He holds the fastest all motor Sohc record with a 9.40" @147.5mph in a fully built F22 non-vtec!
He all so sells lots of other go fast products that are totally affordable.
If you want to have the best you will have to pay a little once and a'while.