Guys,

My friend has a 50mm piping big-tube custom B-series header.
Is it worth to buy it for my b20vtec?
What do you think about the piping connections?

 

Im no header expert but i can see all the primarys are the same length which is a good
thing, but where the tubes merge into two looks bad in my opinion, not the usual angle commonly seen. I dont think the gas flow from cyl 3 will like hitting a wall when it meets cyl 4.

 

ya, that header looks like it wouldn't do too well.

 

pretty. but $5 says a smaller hytech replica or even an ebay header would kill that on a dyno.

 

Just try it and see.

The cylinders don't fire at the same time, and this header may actually do very well...

 

u neve know,ask him if you can dyno it first against what you already have. i wouldnt by it unless i knew there where gonna be gains

 

Looks interesting. Definitely post up how it goes.

 

Its Look Interesting.. youll never know until u try it.

 

You'll be better off with the casted header vs that piece in the photo.

 

That header doesn't have very clean merges from the primary pipes. Anyone who knows anything about header design, knows that the way the collectors are formed, including entry angles, length, in-out diameters etc, will know how that design will hold it back from making good power. The fact that the cylinders don't all fire at the same time won't help this header.