merged size

[speedwell]

may be a stupid question 

 Somebody could give me the various measures for those  in inches and centimeter
 i know there's
1-1/2"
1-5/8"
1-3/4"

 i've collected yesterday a merged exhaust for the 1968cc the inside tube measurement is 38mm

thx in advance
fabs
 

[Nico86]

Just convert inches to mm.

1-1/2" = 38.1mm
1-5/8" = 41.3mm
1-3/4" = 44.5mm

Or maybe you are asking for the length of the tubes and the length of the merged section ?

[speedwell]

thx nico 

[Zach Gomulka]

Headers are measured by their outside diameter. So if it's 1 1/2" on the ID you have a 1 5/8" (OD) header.

[speedwell]

Headers are measured by their outside diameter. So if it's 1 1/2" on the ID you have a 1 5/8" (OD) header.

it's 41 mm outside zach 
that header will be good for my 1968cc if i'm used 40x37.5 mm heads

[Zach Gomulka]

Should work great

[speedwell]

stupid question  there is any fitment difference between the 1 3/8" and the 1 5/8"   the muffler would be maybe an 1 3/8" and the header is 1 5/8" , any problem with the flange

thx fabs

[nicolas]

stupid question  there is any fitment difference between the 1 3/8" and the 1 5/8"   the muffler would be maybe an 1 3/8" and the header is 1 5/8" , any problem with the flange

thx fabs

same flange and no problem. you could even fit your single quiet pack if it had its smaller flange and not the big one.
and just to be sure, yes it is a 1 5/8 and it will work great for your plan. all you may need is a set of gaskets that are the correct size.

 

[speedwell]

thx nico 

[DKK Ted]

I noticed the head flanges are thick, maybe a Berg header? Nice header though!

Ted