[s-cars] exhaust manifold studs

[Kevin Day]

On Sun, Oct 10, 2004 at 10:09:13AM -0400, Bob Rossato wrote:
> The only way to do this right is to use the factory studs.

Good points, thanks.

> The factory stud for the RS2 EM is part number N 906 486 01.  These are M8 x
> 27 studs.  The part numbers for the nuts and washers are N 902 002 01 and N
> 900 955 01.

I approximately measured the depth of the holes in the head, including
the EM flange thickness, and it appears to be a bit over 1" deep.
Assuming your "x 27" above refers to stud length, that doesn't seem long
enough, assuming the stud is intended to fully seat in the hole.  Valid
assumption?

> I don't believe the dealer carries the RS2 studs, but then again they might
> surprise you.  They will definitely have the nuts and washers as those are
> common.  What some folks have done is to get the studs for the stock
> manifold, p/n N 901 889 02, and cut these down as they are longer.  The size
> of those is M8 x 35.  You may not need to cut them down for both locations
> depending on the clearance.

According to the RS2 installation guide at s-cars.org, only four of the
16 studs need to be shortened for the RS2 EM.  Neither of my two missing
studs is in that list (I am missing #7 and #8 on the bottom, counting
from the front).  Am I correct in thinking that I need two stock
manifold studs, 35mm long?

Thanks -- this helps a lot.

-Kevin