GrimmSpeed EWG User Manual

1

***wastegate sold separately

Subaru 38/44mm External Wastegate Up Pipe Kit

Installation Instructions

2002+ Subaru WRX/STi/LGT/FXT

Subaru 38/44mm External Wastegate Up Pipe Kit Installation Instructions

Park your vehicle on a level surface. Fully engage your parking brake and put wheel
stops on the front and rear wheels to keep the vehicle from rolling.

All GrimmSpeed exhaust components are intended for Off-Road use only.

1. Remove plastic splash guard (3) 10mm bolts and 4 plastic clips.

2. Remove small plastic access panel in fender wheel. This will give you access to

o2 sensor.

3. Remove o2 sensor from passenger side exhaust collector with o2 sensor socket.

4. Remove passenger side exhaust collector heat shield (4) 12mm bolts.

Grimmspeed

2

5. Remove (2) 14mm bolts that connect passenger side exhaust collector to up

pipe.

6. Remove (2) 14mm bolts that connect passenger side exhaust collector to

crosspipe.

7. Remove (3) 14mm nuts that connect passenger side exhaust collector to engine

head. Drop passenger side exhaust collector.

8. Remove BOV from intercooler. (2) 12mm bolts.

9. Remove intercooler. Remove (2) 12mm bolts that go to intercooler mounts. (2)

hose clamps, one goes to TB hose, one goes to turbo outlet.

10. Remove the turbo heatshield (6) 10mm bolts.

11. Remove up pipe heat shield. (2) 10mm bolts.

12. Remove the (3) 14mm nuts and (2) 14mm nuts/bolts connecting the downpipe

to the turbo.

13. Remove downpipe from cat-back (2) 14mm bolts.

14. Remove downpipe o2 sensor with o2 sensor socket.

15. Remove (1) 14mm bolt from lower transmission bracket.

16. Remove (1) 14mm bolt from upper transmission bracket.

17. Using a flat-head screwdriver, pry the downpipe support bracket out from the

lower transmission bracket.

18. Drop downpipe.

19. Unplug the factory EGT sensor in up pipe.

20. Remove (5) 14mm nuts that hold top of up pipe onto turbo.

21. Remove passenger side engine mount (1) 14mm nut/washer.

22. Carelly raise engine up with jack and block of wood approx. 2 inches.

23. Drop Up pipe out down to the ground. Be careful not to damage the EGT sensor

on the way out.

24. Place (5) studs in top flange of EWG up pipe.

25. Loosely install EWG up pipe to turbo studs/nuts, remembering to use new

gasket. If you are having troubles mating EWG up pipe to turbo, try installing
with only a couple of the studs installed in the up pipe. Once the EWG up pipe is
on the turbo you can then drop the other studs down from the top.

26. Drop engine back down.

27. Tighten engine mount bolt with washer.

28. Loosely install passenger side exhaust manifold collector to engine head.

Remember to replace gasket.

29. Loosely install (2) 14mm bolts from EWG up pipe to passenger side exhaust

manifold collector. Remember to replace gasket.

30. Loosely install (2) 14mm bolts from crosspipe to passenger side exhaust

manifold collector. Remember to replace gasket.

31. First torque back-most 14mm nut on passenger side exhaust manifold collector

to engine head. Followed by remaining (2) 14mm nuts that hold passenger side
exhaust manifold collector to engine head.

32. Torque (2) 14mm nuts/bolts from passenger side exhaust manifold collector to

EWG up pipe.

33. Torque (2) 14mm nuts/bolts from passenger side exhaust manifold collector to

crosspipe.

Grimmspeed