A consolidated list of data I've had to track down while working on my GR STI. Hope it saves you some time.
Engine| Part | Weight (lb) |
|---|
| OEM intercooler | 15 |
| OEM header | 27 |
| OEM up-pipe | 6 |
| OEM oil pan | 5 |
| OEM secondary air injection system | 11.64 |
| SPT cat-back exhaust | 45 |
| Killer B header | 11.4 |
| Killer B up-pipe | 3 |
| Killer B oil pan, pickup and baffle | 7 |
| Blouch Dominator 1.5 XTR turbo | 16.4 |
| COBB titanium exhaust (GR hatchback) | 23 |
| Tomei Expreme Ti exhaust | 15.2 |
Brakes| Part | Weight (lb) |
|---|
| OEM STI caliper (2011 GR) | 10 |
| DBA 4000 front rotor (OEM size) | 20 |
| DBA 4000 rear rotor (OEM size) | 16.5 |
| AP Racing CP8350 caliper (with pads) | 7 |
| Essex 325 mm rotor | 17 |
| CP8350 + 325 mm rotor, per corner | 24 |
| AP Racing CP9660 caliper (add 2 lb for pads) | 6 |
| Essex 372 mm rotor | 21 |
| CP9660 + 372 mm rotor, per corner | 27 |
Wheels and tires| Part | Weight (lb) |
|---|
| OEM forged BBS 18x8.5 wheel | 20.5 |
| Titan 7 T-R10 18x9.5 wheel | 19 |
| Apex SM-10RS 18x9.5 wheel | 18 |
| Wedsport 18x11 ET+15 wheel | 19 |
| Bridgestone RE-71RS 295/30/18 tire | 28 |
| OEM BBS wheel and tire | 44 |
| Titan 7 T-R10 and 265/45/18 tire | 44 |
| Apex SM-10RS and 265/45/18 tire | 43 |
| Wedsport 18x11 and RE-71RS 295/30/18 | 47 |
Suspension| Part | Weight (lb) |
|---|
| OEM rear upper control arm | 9 |
| Racer X rear upper control arm | 5 |
Body and interior| Part | Weight (lb) |
|---|
| OEM hood | 40 |
| Marsh composite hood (without ducting) | 9.75 (9 lb 12 oz) |
| Rear seat uprights | 29.5 |
| Rear seat base | 13.06 |
| Rear seat mounting brackets | 2.76 |
| Speakers and rear seat belts | 19.68 |
| OEM stereo head unit | 4.3 |
Heating and A/C| Part | Weight (lb) |
|---|
| Heater core | 11.1 |
| Fan blower | 5.74 |
| A/C compressor and bracket | 12.18 |
| A/C evaporator | 5.26 |
| A/C delete bracket | 1.8 |
OEM measurements
| Measurement | Value |
|---|
| OEM wheel size | 18x8.5 +55, 5x114.3 |
| OEM ride height, ground to top of fender arch1 | Front 26.6 in, rear 26.4 in |
| OEM ride height per manual, hub center to top of fender arch2 | Front 14.5 in, rear 14.5 in |
- Measured from the ground to the highest point of the fender's wheel arch, on OEM wheels.
- Measured from the center of the hub to the highest point of the fender's wheel arch. I found these accurate to within 1/8 in on my car.
- All weights were measured with a Proform scale that sometimes rounds up to the next pound, so treat them as accurate to within 1 lb.
Suspension motion ratios and anti-roll bar stiffness are in Suspension Measuring Palooza.