Our XXXL trailing arms are 9" longer than stock. The longer arm keeps the rear wheel from moving as far forward and back as the suspension travels, which gives better rear suspension geometry. They're sold as a left and right pair with hardware.
They don't work with the factory T-Bar. You'll need our T-Bar or Geometry Special, or one of the setups below with the T-Bar Trailing Arm Mounts option.
Which one do I need?
| Your setup | Add the T-Bar Trailing Arm Mounts option? |
|---|---|
| Our T-Bar or Geometry Special | No. Your T-Bar already includes the mounts. |
| A custom T-Bar setup, such as mounting the nose of the diff directly to the car when running a fuel cell, or our Geometry Special ordered with Remove T-Bar | Yes |
| A frame that doesn't use a T-Bar, such as our S14/R32 R200 subframe | Yes |
| The factory T-Bar | Not compatible. XXXL arms don't work with the factory T-Bar. |
The option is only for setups that have no T-Bar of ours.
How the longer arm helps
A trailing arm swings in an arc as the suspension moves, so the wheel also moves forward and back. A longer arm swings in a flatter arc, so the wheel moves less.
Wheel movement forward and back across 7" of suspension travel:
| Arm | Length | Wheel movement | Compared with stock |
|---|---|---|---|
| Stock | Stock | 1.24" | |
| Our +2" Trailing Arms | 2" longer | 1.12" | 10% less |
| XXXL | 9" longer | 0.91" | 27% less |
Options
T-Bar Trailing Arm Mounts. Only needed, or useful, if your setup has no TSSFAB T-Bar. See the table above.
Powder coat. Powder coating adds about 2-6 weeks. See Powder Coating.
What it works with
Works with
- Our T-Bar and Geometry Special, using the mounts that come with them
- Custom T-Bar setups and frames without a T-Bar, such as our S14/R32 R200 subframe, with the T-Bar Trailing Arm Mounts option
Does not work with
- The factory T-Bar
- Our Trailing Arm Mounts, Rally or Track. Those are for stock arms and our +2" arms.
Fitment
A rear part for the GC/GD group:
- Impreza / WRX / STI 1993-2007 (GC, GF, GM, GD, GG)
- Legacy 1990-1999 (BC, BF, BJ, BD, BG, BK)
- Outback 1995-1999 (BD, BG, BK)
- Forester 1998-2008 (SF, SG)
The 2000-2004 Legacy and Outback (BE, BH) are not included, because only our GC/GD front parts fit them.
For GR and VA chassis cars, see our GR XXXL Trailing Arm Kit and VA XXXL Trailing Arm Kit.
Common questions
Can I run these with the factory T-Bar?
No. Run them with our T-Bar or Geometry Special, or with a custom diff mount or a frame without a T-Bar, using the T-Bar Trailing Arm Mounts option.
Is it one arm or a pair?
A left and right pair, with hardware.
I'm buying your T-Bar too. Do I need the mounts option?
No. Every TSSFAB T-Bar, including the one in the Geometry Special, comes with trailing arm mounts.
Why choose XXXL over your +2" arms?
More of the geometry benefit. Across 7" of travel the XXXL arms move the wheel 0.91" forward and back, against 1.12" for the +2" arms and 1.24" for stock.
Can I use your Rally or Track Trailing Arm Mounts with these?
No. Those mounts are for stock-length and +2" arms.