VA, VB, and GR WRX, WRX STi Titanium Subaru Catback
515140 - VA Titanium Subaru Catback
WRX 2008 - 2021
WRX STi 2008 - 2021
515140 - VB Titanium Subaru Catback
WRX 2022 - 2023
Congratulations on your purchase of the COBB Tuning Subaru Catback. 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.
Installation of COBB STI/WRX Catback
Adding a small amount of anti-seize to the smaller, inside piece of each slip joint can help removing it in the future. Particularly because as you tighten down the clamps the pipe will typically deform slightly.
- Take the rubber muffler hangers off of the vehicle and install them onto the new exhaust components.
- Now go ahead and add the mid-pipe to your stock or COBB J-pipe. Leave the spring bolts loose for now in order to allow the exhaust the play it needs. If using the COBB J-pipe make sure to use the donut flange adapter.
- Put the rubber hanger over the y-pipe exhaust hanger and then attach it to the car. Once the hanger is attached, go ahead and slip the exhaust together making sure to put the larger hose clamp over the pipe first but leave it loose for now.
- Starting with the short side (left) pop one of the 2.5" clamps over the exhaust and slip the muffler section in place.
- Now roll it up behind the bumper and install the exhaust hangers.
- Repeat the same operation from step 4 & 5 on the longer side (right)
Go through and make sure each of the slip fits over the otherand that the clamp is over the cut part of the pipe with some pipe remaining on the cut side. Once that is accomplished tighten down each section so that it is still movable but holds it's position so you can get things lined up. You'll need a 10mm socket for the smaller clamps and a 13mm for the large 3" on the mid-pipe to y-pipe.
- Try to get everything lined up. Each of the slip fit sections have some give and room so you should be able to get it pretty close.
- Go through and tighten up all of the slip fits, starting at the bumper end and working forward. You can just go until it's relatively tight. Overly tightening can either cause damage to the clamp or bend the piping.
- Last but not least, finish tightening down the spring bolts using your 14mm and 12mm. Make sure to stop tightening when the flat shoulder rests on the exhaust flange.
- Using your 10mm and the remaining clamps, attach the slip fit tips into place in whatever configuration you'd like!
Links
COBB Product Install Instructions for Subaru Vehicles
Main Installation Instruction Repository for Subaru Parts
Calibration Map Notes for Subaru Vehicles
Link to Subaru Map Notes to see what map you should be on given the parts you've added
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