From Binnie at
Just a few explanatory notes about the brackets. The two top
brackets are identical and the two bottom brackets are identical.
Both sets of C3 tracks are identical so you need a pair for each
seat. All brackets are drilled and
tapped in the same configuration. Please note that two of the
brackets have a 1/4" curved indentation. This is to allow clearance
for the C3 seat adjust lever. Put that indentation in your brackets
before you drill the holes. The smaller holes (for attaching C3
tracks to brackets) are drilled 17/64" and tapped 8 X 1.25 mm. The
larger holes (for attaching seat to brackets) are drilled 21/64".
The longer metric Allen head machine screws attach the brackets to
the seats and the short ones attach the tracks to the brackets. The
end with the holes directly opposite one another go to the rear of
your seats. The centers of the larger holes for the seat bolts are
drilled 1/2" from the edge while the centers of the smaller holes
for the track bolts are drilled 3/8" from the other edge. These
dimensions will center your seat tracks on the floor mounting holes
of your car.
*Note that if you have a power driver seat, the power motor track
assembly has a different bolt configuration and will not work with
the configuration of these brackets.
If you do not wish to fabricate the brackets yourself, I always have
a kit ready to ship out which includes the four painted brackets and
bolts - $115.00 and includes free shipping within Canada and USA.
You can purchase a set of these brackets on my website at
Thank you, Binnie.