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M52 (L6)
M52TU (L6) -- the aluminum block
version of the M52
M42 (L4) 1.8
M30 (L6):
3210cc (3.2L); 3430cc (3.4L); 3453cc (3.5L)
-- NEW! Now a dual scraper
pattern: $119.95
NEW! The M20 pattern is now a
dual-scraper -- the added blade operates on the downstroke and
shunts the oil to the side of the pan. M20
(L6): 2.0, 2.3, 2.5, 2.7 $109.95 [steel]; $209.95
[TeflonŽ]
Steel version above
TeflonŽ version pics immediately above and below
Here are a couple pictures of a Teflon 91mm stroker:
NEW! M20 IX pattern (all-wheel
drive -- the drive shaft passes through the sump) is now a
dual-scraper -- the added blade operates on the downstroke and
shunts the oil to the side of the pan. $149.95
M20 IX
A picture of a special M20 2.0 version -- the cross supports
allow the scraper to be used as a light duty girdle when studs and
spacers are employed:
These pics of earlier patterns show the trap doors and how the
pattern sits with respect to the pan.
M10
(L4): 1.8, 2.0
New!
M10 crank scraper with dual independent trap doors and now a second
scraper. These trap
doors allow oil to freely drain from the side of the block without
becoming trapped on top of the scraper but during high speed sweeper
turns the doors swing shut. This helps prevent a well-known
problem with the tilted engine design of oil traveling up the side
of the block. At the rear of the scraper a ledge has been
added to help prevent oil from climbing the rear of the sump during
heavy acceleration. $109.95
[steel]; $209.95 [TeflonŽ]
Note that the S14 in the M3 uses the same M10 scraper. The scraper
installs between the upper alloy sump piece and the block. The only
thing that might be an issue is that there are a couple S14 versions
using different strokes. The most common version is the 2.3 litre
with an 84mm stroke. Italy had one at 2.0 litres with a 72.6mm
crank and the EVO2 S14 with 2.5 litres had an 87mm crank.
Pics immediately above and below are of the dual scraper in steel
M10 dual scraper with TeflonŽ:
The pictures below show an earlier pattern and how it sits
with respect to the pan: 
The last picture below shows the trap doors on an earlier
pattern:
  
Latvia
Chuck
Taylor, racer and owner of Factory 3 Performance writes:
This is what I know about crank scrapers:
Don't install an oil pressure gauge if you aren't
planning to also install a crank scraper.
The factory oil pressure warning light is set to come on at
around 7-8psi. Your warning light probably never
illuminates while driving.
Once I installed an oil pressure gauge, I found that in the
fast left hand corners (like T3 at Roebling) the car was
dropping from 50PSI to around 16. Not good. Especially at
5000+ RPM. Even running a quart over full didn't help.
Talk about too much information!
We installed one of the crank scrapers over the winter, and
now the car holds full pressure everywhere on track.
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