I've been told it's 2.5" from some dealer and some said it's 3"? I know S2000's and the Type R's are only 2.5". Thank you.

Donut gasket between the header (manifold) to the cat.

 

Do you have a helms manual?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by risktypeS &raquo;</TD></TR><TR><TD CLASS="quote">Do you have a helms manual?</TD></TR></TABLE>

I don't

 

I have a "helms manual". Yes it is a helms manual in pdf format. If you would like a copy i can PM you later with a link to download it after i upload it. I am currently at work right now and don't get off till 11pm it is 532pm right now. But that's if you want a copy. It'll answer a lot of your OEM questions.

 

did you want a copy?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by risktypeS &raquo;</TD></TR><TR><TD CLASS="quote">did you want a copy?</TD></TR></TABLE>

It's ok, if it's too much trouble. I just need to know what size is the donut gasket. Thank you buddy.

 

it doesn't say.

 

I can measure this for you sunday