INSTALLATION INSTRUCTIONS
57-2531
5/16” Wrench
Flat blade screwdriver
4mm Allen wrench
10mm Wrench
7/16” Wrench
Ratchet
Short Extension
7/16 Socket
1. Turn the ignition OFF and disconnect the
vehicle's negative battery cable.
3. Loosen the screws that secure the air
cleaner top as shown. (see arrows)
2. Loosen and remove the bolt on the
radiator core support, then remove the air
inlet duct as shown
.
9. Apply the provided trim seal to the
K&N heat shield as shown.
10. Using the provided hardware, install
the straight bracket onto the bottom of the
K&N heat shield as shown.
11. Using the provided hardware, install
the large "L" bracket onto the K&N heat
shield as shown.
12. Assemble the small "L" bracket and
the saddle bracket using the hardware
provided as shown.
15. Loosen and remove the two bolts that
secure the fuse box bracket to the inner
fender as shown. (see arrows)
16. Remove the stock retaining nut on
the air temperature sensor as shown.
13. Install the saddle bracket assembly onto
the K&N heat shield using the provided
hardware as shown.
4. Loosen the hose clamp at the turbo inlet
tube, then remove the upper air cleaner
assembly as shown.
5. To remove the air temperature sensor, turn
the sensor ¼ turn, then, pull the sensor out of
the lower air cleaner assembly as shown.
6. Loosen the nut that secures the lower air
cleaner assembly as shown.
7. Pull firmly upwards to release the lower
air cleaner assembly from the retaining
grommets, then remove as shown.
8. Using a small flat blade screwdriver,
release the Air Temperature Sensor retaining
clips, then disconnect the electrical connec-
tion as shown.
14. Install the silicone hump hose onto
the K&N intake tube as shown and secure
with the provided hose clamp.
NOTE: This kit was not designed
to fit vehicles with a body lift.
Ford
1994.5-1997 F250, F350 SuperDuty
V8-7.3L Turbo Diesel Powerstroke
A
B
A
C
A
J
H
I
G
F
E
D
L
H
K
M
J
H
L
J
H
H
L
O
I
H
J
H
N
P
Q
L
H
R
S
Description
Qty.
P/N
A
Hose clamp #64
3
08648
B
Hump hose
1
08418
C
K&N intake tube
1
087043
D
Bolt, 6mm f/h/a
1
08376
E
Saddle bracket
1
078855
F
Washer, conical
1
08180
Description
Qty.
P/N
G
Bracket, small “L”
1
08025
H
Washer, 1/4
10
08275
I
Nut, 6mm nylock
2
07553
J
Bolt, 1/4 hexhead
4
08386
K
Bracket
1
26519
L
Nut, 1/4 nylock
4
07517
Description
Qty.
P/N
M
Heat shield
1
07460
N
Edge trim, 48”L
1
102485
O
Bracket, medium “L”
1
07879
P
Hose clamp #72
1
08671
Q
K&N FIltercharger
1
RC-4780
R
Filter bracket
1
26518
S
Grommet
1
08167
Parts list
Tools
TO START: