Logic Motorsports Tri Y header

[illinois_erik]

But isn't the High End itself a replica of one of HyTech's H22 designs?

hytech's is a little different


Highends are straight long tubes w/o the 4-2-1 merge from the head


tri-y is just a long tube header styles generic name, they have tri-y's for 55 belairs.. and it looks like theres about 4 cloners of hytechs tri each adding their own little twist like a flange from Header to Downpipe or an extended downpipe with a flex and cat flange..

I like highends based on looks and that it has long straight tubes almost to the collector this will be a big help with grunt down low. The only thing that baffles me is that almost all headers you see combine cylinders 1 & 4 and 2 & 3, probably for scavenging. whereas this one(highends) 1&2 / 3&4 are together

[deevergote]

It is very similar, but I'm going along with support for this one because it's apparently well made and supported, and not a clear knockoff.

There are some that are obviously poor quality knockoff designs... some even marketed as such. I simply cannot support those. The low quality and low price makes the companies that make quality parts for us abandon this market very quickly.

[GhostAccord]

tri-y is just a long tube header styles generic name, they have tri-y's for 55 belairs.. and it looks like theres about 4 cloners of hytechs tri each adding their own little twist like a flange from Header to Downpipe or an extended downpipe with a flex and cat flange..

I like highends based on looks and that it has long straight tubes almost to the collector this will be a big help with grunt down low. The only thing that baffles me is that almost all headers you see combine cylinders 1 & 4 and 2 & 3, probably for scavenging. whereas this one(highends) 1&2 / 3&4 are together

Long tube headers are for top end and high RPM... There are Tri-y (4-2-1) style headers and there are 4-1 style headers. Ether can be long or short tube. Depending on where your engine is designed to make power. The cylinder pairing is based on the engines firing order. it is to make use of scavenging.

Tri-y used to be more for the street/circuit track and low end power. Where as the long tube 4-1 was more of a drag race oriented header. Header designers have now incorporated tri-y into long tube designs as well. This is more of a cross between the two. Alloing the scavanging effects of the Tri-y inot a long tube design for engines of higher RPM levels.

Long primary tubes = mid - high rpm range
Short primary tubes = low to mid rpm range

Biggest thing to look for in the fabrication of any of these headers is the type of materials used.

304 Stainless in a 14-16 gauge would be preferred. Start getting thinner than that and you are loosing heat from the exhaust tubes and into the engine bay.

Most of the knock off headers just say they are stainless steel and don't even mention the grade or wall thickness. Most are paper thin and a lower grade stainless.... 400 series most likely as I was able to stick a magnet to the set I bought for testing. The wall thickness was thinner than 18 gauge. It was paper thin. Not anything that I would put on any engine.

[CyborgGT]

My question was rhetorical, sorry. HyTech makes two basic header designs for the H22: a short tube (which looks like the first one in illinois_erik's last post) you can get in either of two specifications, and a long tube that the High End replicates.

Another relatively cheap option for a quality short-tube header, for $570, is the re-released Vibrant:

https://www.roskoracing.com/cgi-bin/...n&key=VIB-2540

[gainesvilleCB7]

With the Vibrant header mentioned above, does it leak where the two pieces meet? That would be the only flaw that i could notice. Could I get it welded together to eliminate the springs?

[CyborgGT]

You could get it welded... hell, it's probably best. By nature that design is not going to be a perfect seal, but I haven't heard any stories of noticeable leakes.

Special deal for Prelude Power members that I'm sure Rosko will still honor at $550 shipped (detailed info on the header in this link as well):

http://www.preludepower.com/forums/s...d.php?t=345446

Another benefit of the Vibrant over the High End is that it doesn't require notching the cross-member or replacing it with a traction bar to fit. Still clears A/C and power steering.

[gainesvilleCB7]

Awesome, I already have an aftermarket traction bar so that won't be an issue.

[CyborgGT]

It fits around A/C. Check out that thread I linked, it's got tons of pictures fitted onto an H23A VTEC in a fifth-gen Prelude. As far as engine fitment, it's exactly what you'd see in your H22 Accord.

[gainesvilleCB7]

That looks like the one I'm gonna need, thanks for the links!

[CyborgGT]

Really just depends on what kind of performance you're looking for, like GhostAccord explained, short tube vs long. Both are popular, quality headers.

[gainesvilleCB7]

my motor loves top end and will be used mainly for drag racing so the long tune will be my best option i think

[8ball]

I have to side with deev about the knock off products (only slightly). I was looking for amber DEPO corner lights... yeah they are no where online any more.

[CyborgGT]

my motor loves top end and will be used mainly for drag racing so the long tune will be my best option i think

Then you'll be wanting the High End, not the Vibrant.

[gainesvilleCB7]

ok, i will let everyone know how it goes