Installation Instructions

79-04 Ford Mustang Perfect Fit K-Member
Part # 20022
Installation Instructions
Congratulations on your purchase of the AFCO Perfect Fit K-member for
the 79-04 Ford Mustang. Please read and understand each of the steps
involved with the installation of your new k-member prior to getting started.
The AFCO team takes pride in providing the utmost in quality and performance.
Should you have a concern about the product you receive, please contact AFCO
Customer Service at 1-800-632-2320 Ext 6281 or Email to
sales@afcoracing.com
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
Special Notes Before You Get Started
AFCO highly recommends hiring a professional installer, one that is familiar with the
installation of aftermarket performance products.
AFCO products are not covered under any warranty either expressed or implied.
AFCO is not responsible for any product that has been improperly installed,
crashed, welded to, or modified in any way. AFCO does not cover damage to
any related components. Neither the seller nor AFCO will be responsible or
liable for any loss, damage, or injury resulting from the direct or indirect use of
this product or inability by the purchaser to determine proper use or application
of this product.
This instruction manual is written for two
different scenarios:
1. With the factory k-member and engine
still installed.
2. With the factory k-member and engine
removed
1. Take inventory of all the parts you have to install your new k-member.
Make sure each piece is accounted for prior to taking your vehicle out of
service.
2. Look at the Tool and supply list below to make sure you have all the
needed tools and supplies before you get started.
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
Tool and supply list
Miscellaneous hand tools are required for proper installation of this Kmember. We have listed a few of the required and optional tools to help with
your installation.
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Assorted metric sockets and wrenches (required)
Assorted standard sockets and wrenches (required)
Ratchet and extensions (required)
25-200 ft/lb torque wrench (These usually can be borrowed or rented
from most local auto part stores)
4 plumb bob’s
Tape measure
Rubber mallet or dead blow hammer
Floor jack and jack stands or a hydraulic lift
Engine hoist or engine truss
Coil spring compressor
Safety glasses or goggles
Penetrating fluid (optional)
Fender pads (optional)
Work gloves (optional)
3. The factory struts and springs cannot be used with this installation.
Therefore the following parts are required:

AFCO Struts

2-5/8” I.D. Coil-Over Springs: 10” or 14” can be used with coil over strut
kit.
(Part # 30022)
Recommendations:
Drag race applications: 14” tall 125 lb. rate (Part# 24125CR)
Non–drag race applications: 10” tall, 200 lb. rate (Part# 23200CR)
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Coil- Over Kit Part # 29022
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Caster/Camber Plates Part #’s 40022 (79-89), 40023 (90-93) and 40024
(94-04)
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AFCO Lower Control Arm Install Kit (Part# 200017)
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
On 79-93 Models, some additional steering components are also required.
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¾ X 36 to ¾” DD low profile steering u-joint. AFCO part# 200003 or
Flaming River part# FR1925
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¾ DD to ¾ DD low profile steering u-joint. AFCO part# 200004 or
Flaming River part# FR1920
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¾ DD steering shaft Material. AFCO part# 200007 or Flaming River
part# FR1850SS
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Steering column tongue. 3” FR1504T or 6” FR9950TLG
(On 94-04 Models the steering parts listing above is not required,
however will provide extra header clearance.)
Optional Parts Available for your new K-Member
Your new K-member has been designed to be compatible with factory lower
control arms and factory rack and pinion. However we also recommend the
following optional parts:

Lightweight Tubular Lower Control Arm Assemblies Sold in pairs.
Part # 200008 (79-93 rod end style)
Part # 200009 (79-93 bushing end style)
Part # 200010 (94-04 rod end style)
Part # 200011 (94-04 bushing end style)

Engine Mount Kits Available
Part # 20024 (5.0 Small Block Ford)
Part # 20025 (4.6 Modular Ford)
Part # 20026 (SBC, BBC, & LS Based Engines)
Part # 20027 (Big Block Ford)
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
A
B
C
4. Measure the distance across the front mounting holes center-to-center.
This number should be about 34" for the 1st set (A) and 33-3/8” for the
second set (B). Complete the same measurement on the outside rear
mounting holes (C). This number should be about 32 1/4" center to
center.These measurements are the same for the SN95 and Fox Body.
Check these measurements to determine if the frame is close to factory
specs. If your measurements are considerably different you may
experience installation and alignment issues.
5. If you are putting in a different engine and transmission combination other
than stock it may be necessary to modify the transmission crossmember.
6. Measure the ride height at the front wheel on both sides of the car
and document the measurement. Note: Measure ride height on a flat level
surface from the ground to the bottom edge of the front fender. Stock ride
height should measure around 27”s.
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
Safety Notes:
While this installation can be done on the floor with the use of jack stands, we
strongly recommend that this job be completed utilizing a hydraulic lift. The use
of safety goggles is strongly recommended, as debris may be dislodged from
beneath your vehicle while removing or installing parts.
Stock K-member Removal with Engine Still in Vehicle
1. Disconnect the negative battery cable.
2. Raise the front and the rear of the car up as high as possible next, support
on jack stands, on each front frame rail just behind the radiator support
and under the rear axles on the rear.
3. Support the engine with an engine hoist or an engine support truss.
4. Remove the front wheels.
5. Unbolt the caliper off of the spindle and hang it out of the way to prevent
damage to the brake hose.
6. Place a floor jack under the lower control arm. Leave enough room
between the jack and the control arm to tap the ball joint loose from the
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
spindle but not removing it. Once loose the control arm will rest against
jack keeping pressure on the spring until it is compressed in a later step.
7. Remove the sway bar link from the control arm
8. Remove the tie rod end from the spindle.
9. Lower the jack just enough to separate the control arm from the spindle.
10. Remove strut bolts at the spindle and remove the spindle.
11. Remove the strut.
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
12. Use an internal spring compressor and compress the spring. CAUTION: A
compressed spring is under an extreme amount of load and if compressed
improperly could result in serious injury. Make sure you follow the
directions of the spring compressor.
13. Lower the jack and carefully remove the spring.
14. Repeat steps 5 through 13 for the other side of the car.
15. Remove the bolt holding the steering shaft to the rack and pinion also
remove the shaft from rack and pinion.
16. Unhook power steering lines and remove the rack and pinion.
17. With engine supported remove engine mount bolts and raise engine
enough to clear the mounts from k-member.
18. Check for any wiring/ground straps etc. attached to k-member and remove
if necessary. Place a floor jack under the center of the k-member and
loosen 8 bolts fastening it to the vehicle. Lower the jack and remove kmember from vehicle.
19. With the k-member removed, install the new engine mounts to the engine
block. Torque the bolts to 50 ft-lbs
20. Install all bolts in the k-member and only snug the bolts enough that the kmember can still be moved from side to side and from front to back. The
front frame rail bolt is 9/16 X 5-1/2” long and rear frame rail bolt is 9/16 X
6” long. The four rear mounts maintain the use of the factory bolts.
21. Square the k-member at this time using plumb bob’s. (Refer to the chart
on the next page for reference.) Start by squaring the k-member from
front to rear and move the k-member accordingly until measurement “A”
and measurement “B” are equal. Without moving the k-member from front
to rear square the k-member from side to side until measurement “C” and
measurement “D” are equal. Refer to diagram below. Note: Be sure that
the plum bob’s are hanging from the same points on each side of the
car so the measurements are accurate, the outside of the rear control
arm bolt against the nut on the rear of the car and directly in the
center of the front control arm mounting bracket on the front of the
k-member.
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lit1024 rev1 k-member
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
22. Torque the four front k-member bolts to 115 ft-lbs and the four rear bolts to
72 ft-lbs. The k-member was designed to use a 9/16 USS washer on the
front bolts, 1-1/2” outside diameter, 5/8” inside diameter and 1/8” thick.
Once the bolts are all torqued double check the measurements to make
sure the k-member is still square. If the k-member has moved during the
tightening process, loosen and start the squaring process again.
23. Lower the engine down until you line up the engine mount and the engine
mount bushings.
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lit1024 rev1 k-member
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
24. Install motor mount bolts and torque to 80 ft-lbs.
25. Install the lower controls arms. If installing the factory control arms and the
optional premium hardware kit, torque the bolts to 159 ft-lbs. If installing
tubular control arms refer to the recommended torque spec from the
manufacturer.
Front
One 1/8” spacer and one .850 spacer
Rear
one 1/8” washer and one 1/16”
washer
26. Install the rack & pinion and torque bolts to 80 ft-lbs
27. Install the spindles to the control arms and torque the nuts to 120 ft-lbs
28. Install the caster/camber plates following the installation manual for the
caster/camber plates.
29. Install the coil-over struts following the strut installation manual.
30. Tighten strut bolts to spindles then torque to 148 ft-lbs
31. Install tie rod ends and torque to 59 ft-lbs.
32. Reinstall the calipers
33. Reinstall the sway bar. It may be necessary to raise the control arms using
a floor jack or lower the car down on it’s suspension to reinstall the sway
bar end links.
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
34. Reinstall the front tires. (Refer to owners manual for lug nut torque
specifications
35. Center the rack and pinion travel from side to side. Follow these steps:
Install the steering shaft onto rack and pinion. It is not necessary to
Step 1
tighten it at this time. Turn the steering wheel all the way to the right.
Step 2
While turning the steering wheel; count the revolutions from lock to
lock on the rack and pinion. Divide the number of revolutions by 2.
Step 3
Starting from one side, turn the wheel from the number calculated
in step 2 to center the rack and pinion.
Step 4
Remove the steering joint at the rack and pinion. Make sure you
don’t turn the rack and pinion during removal.
Step 5
Straighten the steering wheel from inside the car and re-install the
steering shaft and torque the steering shaft bolt to 25 ft-lbs. If using an
aftermarket shaft refer to the manufacturer instructions for torque specs.
36. Adjust the caster and camber as close as you can by eye and be sure to
have an alignment done on the vehicle. It also may be necessary to adjust
the toe as close as you can before the alignment.
37. Remove the jack stands.
38. Settle the suspension by rolling the car forward and back a few times and
pushing down on the front and the rear of the car a few times before
checking ride height.
`
39. Measure the ride height in the same manner as instructed earlier in this
manual and adjust accordingly. Refer to the installation manual for the
coil- over struts for the proper adjusting procedure.
40. Contact your local alignment shop for an appointment to get your
alignment specification set.
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lit1024 rev1 k-member
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
K-member installation with engine and factory k-member
removed.
1. Raise the front and the rear of the car up as high as possible next, support
on jack stands on each front frame rail just behind the radiator support and
under the rear axles on each side.
2. Install all bolts in the k-member and only snug the bolts enough that the kmember can still be moved from side to side and from front to back. The
front frame rail bolt is 9/16 X 5-1/2” long and rear frame rail bolt is 9/16 X
6” long. The four rear mounts maintain the use of the factory bolts.
3. Square the k-member at this time using plumb bob’s. (Refer to the chart
below for reference.) Start by squaring the k-member from front to rear
and move the k-member accordingly until measurement “A” and
measurement “B” are equal. Without moving the k-member from front to
rear square the k-member from side to side until measurement “C” and
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lit1024 rev1 k-member
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
measurement “D” are equal. Refer to diagram below. Note: Be sure that
the plum bob’s are hanging from the same points on each side of the
car so the measurements are
accurate, the outside of the rear control arm bolt against the nut on
the rear of the car and directly in the center of the front control arm
mounting bracket on the front of the k-member.
4. Torque the four front k-member bolts to 115 ft-lbs and the four rear bolts to
72 ft-lbs. The k-member was designed to use a 9/16 USS washer on the
front bolts, 1-1/2” outside diameter, 5/8” inside diameter and 1/8” thick.
Once the bolts are all torqued double check the measurements to make
sure the k-member is still square. If the k-member has moved during the
tightening process, loosen and start the squaring process again.
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lit1024 rev1 k-member
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
5. Install lower controls arms. If installing the factory control arms and the
premium hardware kit torque the bolts to 159 ft-lbs, refer to the pictures
below for control arm spacer location. If you’re installing
tubular control arms refer to the recommended torque spec from the
manufacture.
Front
Rear
One 1/8” spacer and one 1.850 spacer
one 1/8” washer and one 1/16”
washer
6. Install the rack & pinion and torque bolts to 80 ft-lbs.
7. Install the spindles and torque the nuts to 120 ft-lbs.
8. Install caster/camber plates following the installation manual for the
caster/camber plates.
9. Install the coil-over struts following the installation manual for the struts.
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
10. Tighten strut bolts to spindles and then torque to 148 ft-lbs.
11. Install tie rod ends and torque to 59 ft-lbs.
12. Reinstall the calipers.
13. Reinstall the sway bar. It may be necessary to raise the control arms up
using a floor jack or lower the car down on it’s suspension to reinstall the
sway bar end links.
14. Lower the engine down until you line up the engine mount and the engine
mount bushings.
15. Install motor mount bolts and torque to 80ft-lbs.
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
16. Hook up all remaining wiring, hoses, etc. From the engine removal.
17. Reinstall the front tires. (Refer to owner’s manual for lug nut torque
specifications)
18. Center the rack and pinion travel from side to side. Follow these steps:

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Install the steering shaft onto rack and pinion. It is not necessary to tighten
it at this time. Turn the steering wheel all the way to the right.
While turning the steering wheel, count the revolutions from lock to lock on
the rack and pinion. Divide the number of revolutions by 2.
Starting from one side, turn the wheel to the divided number to center the
rack and pinion.
Remove the steering joint at the rack and pinion. Make sure you don’t turn
the rack and pinion during removal.
Straighten the steering wheel from inside the car and re-install the steering
shaft and torque the steering shaft bolt to 25 ft-lbs. If using an aftermarket
shaft refer to the manufacturer instructions for torque specs.
19. Adjust the caster and camber as close as you can by eye and be sure to
have an alignment done on the vehicle. It also may be necessary to adjust
the toe as close as you can before the alignment.
20. Remove the jack stands.
21. Settle the suspension by rolling the car forward and back a few times and
pushing down on the front and the rear of the car a few times before
checking ride height.
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lit1024 rev1 k-member
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AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC
22
Measure the ride height in the same manner as instructed earlier in this
manual and adjust accordingly. Refer to the installation manual for the coil
over struts for the proper adjusting procedure.
23. Contact your local alignment shop for an appointment to get your
alignment specifications set.
Congratulations! You have just completed the installation of
your Perfect Fit K-Member. You now have the highest quality,
best performing k-member available.
977 Hyrock Blvd  P.O. Box 948  Boonville, IN 47601
Phone: (800) 632-2320  Fax: 812-897-6264
www.afcoracing.com
We make every effort to build our products to the highest standards of
workmanship and materials possible. This also applies to our documentation.
We have tried to make the removal of the stock system and the installation of
the new system as clear and concise as possible. If, however, you find points
in our instruction manual that you feel need to be clarified or changed, please
e-mail us your constructive comments. We will use them to correct and
enhance our documentation to the benefit of all customers.
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lit1024 rev1 k-member
3-23-11
AFCO Racing Products P.O. Box 548 Boonville, IN 47601, 800-632-2320 Fax: 812-897-1757, www.AFCORacing.com
Copyright 2011 AFAB, LLC