915760 - COBB SPORT SPRINGS 2008-2013 Subaru WRX/STi Congratulations on your purchase of the COBB Sport Springs for your 2008-2013 Subaru WRX/STi. The following instructions will assist you through your installation process. Please read them first BEFORE beginning the install and familiarize yourself with the steps and tools needed. If you feel that you cannot properly perform this installation, we HIGHLY recommend you take the vehicle to a qualified and experienced automotive technician.
Part List (2) Front Springs (915760F) (2) Rear Springs (915760R) Tools Needed Flat Head Screwdriver Hacksaw or Razor Blade 5mm Allen Wrench 6mm Allen Wrench Ratchet Breaker Bar 12mm Socket 14mm Socket 17mm Socket 19mm Socket 14mm Boxed-End Wrench 17mm Boxed-End Wrench 19mm Boxed-End Wrench Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 2
Pre-Installation Preparation 1. While the car is still on the ground, it is a good idea to break the lug nuts loose using a 19mm socket (stock lug nuts) and breaker bar. 2. With the car on a lift, or supported by four (4) jack stands, remove all four (4) wheels. Removal of Stock Front Suspension 1. Before removing any part of the factory suspension, we recommend marking the camber bolts in order to return the car to approximately the same camber settings when the springs are reinstalled. Mark the top bolt on the bolt-head side (not the nut) and its relative position on the strut, as shown below. We still recommend having the car professionally aligned after the installation is complete to assure that your car is within proper specifications. 2. Using a 12mm socket, remove the two bolts that hold the brake line and ABS sensor wire to the strut, as shown above. Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 3
3. Using a 19mm socket on a breaker bar and a 19mm open-end wrench, remove the two bolts that attach the strut to the hub. Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 4
4. Remove the three nuts that attach the strut top to the chassis using a 12mm socket. Make sure to support the strut when removing the last nut, as it will drop out. At this point, the strut may be completely removed from the car. Repeat these steps on the opposite side of the car. 5. With the strut out of the car, be sure to mark the relation of the upper spring perch to the lower spring perch and the end of the spring coil on the spring perch, as shown below. If it is not reinstalled in the same relation, the upper spring perch may contact the chassis while turning. 6. Using a flat-head screwdriver, remove the rubber cover in the center of the top hat to access the 17mm nut. Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 5
7. Place the strut in a spring compressor, or similar device, and compress the spring until it relieves the tension on the upper spring perch. While compressed, remove the 17mm nut in the center of the top hat. If you do not have high speed air tools, it may be necessary to use a 6mm allen wrench inserted into the top of the strut shaft to prevent spinning while a 17mm boxed-end wrench is used on the nut. When removing the factory spring, pay attention to the assembly so it can later be reassembled properly. It may help to completely disassemble and reassemble one side at a time, so that you have the other side for reference. 8. With the factory spring removed, you may now remove the bump stop, which sits on the strut shaft underneath the shock boot. Using a hacksaw or razor blade, trim the very bottom section from the bump stop as shown and reinstall. Please take care not to injure yourself or someone else. Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 6
Installation of COBB Tuning Sport Springs 1. Place the strut back in the spring compressor and install the COBB Sport Springs with the same orientation as the factory springs. Reinstall the upper spring perch, washer and top hat, and torque the 17mm nut to 41 ft-lbs. 2. Reinstall the strut in the chassis and torque the three 12mm nuts on the top hat to 15 ft-lbs. 3. Reinstall the two 19mm bottom bolts and torque them to 129 ft-lbs. 4. Reinstall the ABS wire and brake line bolts and torque them to 24 ft-lbs. Removal of Stock Rear Suspension 1. Start by opening the trunk and pulling out the carpet. Remove the two small plastic panels to access the two 14mm nuts that hold the shock top in place. Using a 14mm socket, remove the two 14mm nuts. Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 7
2. Now move underneath the car and using a 17mm socket and 17mm open-end wrench, remove the bolt that holds the shock to the lower control arm. Also remove the 17mm bolt that holds the lower control arm to the hub. Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 8
3. Use a 14mm open-end wrench to disconnect the sway bar endlink from the sway bar while using a 5mm allen wrench to keep the shaft from spinning. You may also need to slightly loosen the 14mm nut and bolt that holds the endlink in the lower control arm in order remove the endlink out from the sway bar. 4. You should now be able to pull down the lower control arm and pull the shock up and out. Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 9
5. With the rear shock out of the car, mark the upper spring perch in relation to the lower spring perch to indicate the proper position. 6. Place the shock in a spring compressor, or similar device, and compress the spring until it relieves the tension on the upper spring perch. While compressed, remove the 14mm nut in the center of the top hat. If you do not have high speed air tools, it may be necessary to use a 6mm allen wrench inserted into the top of the strut shaft to prevent spinning while a 17mm boxed-end wrench is used on the nut. When removing the factory spring, pay attention to the assembly so it can later be reassembled properly. It may help to completely disassemble and reassemble one side at a time, so that you have the other side for reference. Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 10
7. With the factory spring removed, you may now remove the bump stop which sits on the strut shaft underneath the shock boot. Using a hacksaw or large shears, trim the very bottom section from the bump stop as shown and reinstall. Installation of COBB Tuning Sport Springs 1. Place the shock back in the spring compressor and install the COBB Sport Springs with the same orientation as the factory springs. Reinstall the upper spring perch, washer and top hat, and torque the 14mm nut to 43 ft-lbs. 2. Reinstall the shock in the chassis by first loosely installing the 17mm bolt that holds the shock in the lower control arm. 3. Push the control arm up, making sure the top hat studs go into the holes, and install the 17mm bolt that holds the lower control arm to the hub. 4. With all the bolts loosely installed, the wheels need to the reinstalled and torqued. The car should be lowered in order to properly torque the remaining bolts. 5. Tighten the 17mm bolt that holds the lower control arm to the hub to 89 ft-lbs. 6. Tighten the 17mm bolt that holds the shock to the lower control arm to 89 ft-lbs. 7. Tighten the 14mm bolt that holds the sway bar endlink to the lower control arm to 34 ft-lbs. 8. Reinstall the endlink in the sway bar and tighten the 14mm nut to 34 ft-lbs. 9. Finally, tighten the two upper 14mm nuts to 22 ft-lbs. 10. Reinstall the interior trim pieces and carpet. 11. Enjoy your COBB Sport Springs! Copyright 2012 COBB Tuning Products LLC. All Rights Reserved www.cobbtuning.com 11