Difference between B and D series header flanges.
 

I am manufacturing header flanges for the Honda B series and the D series engines. How can I identify the flanges, they are very similar.

One flange is about 1/2" longer than the other one.

Could someone help me in identifying them.

Thank You for your help, Trent.

Re: Difference between B and D series header flanges. (TrentWar)
 

HELP!!!!!

Re: Difference between B and D series header flanges. (TrentWar)
 

the B has big ass ports and the D's are tiny compaired to it

Re: Difference between B and D series header flanges. (Sideout)
 

Thanks Sideout,
The header flanges that I currently have, have identical size ports. One header flange is longer than the other. I need to know which is the D and which is the B. Longer or Shorter?

Re: Difference between B and D series header flanges. (TrentWar)
 

longer i believe is the bseries....i will check tomorrow when i get to the shop i have both....

Re: Difference between B and D series header flanges. (TrentWar)
 

UH, you are manufacturing these and don't know which is which? I find that somewhat bothersome. You don't have machinest drawings that refers to which is which application?

Re: Difference between B and D series header flanges. (TrentWar)
 

just checked d vs b.....b is about 3/8in longer....