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IWSTI Engine & Drivetrain
2.5 Liter/Litre Factory Motor
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GR-Exhausts
GD-Exhausts
Discuss anything related to the exhaust system, like muffler, catback, and turboback exhaust systems.
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717
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Your answer to "I want 400whp" (or more?!)
fourseasonsandles
Dec 27, 2011
6
7
8
156
231K
Jun 2, 2023
by
SubieEJ
Sticky
Motor Oil - All Chapters, Inclusive -Hat Tip to Ferrarichat.com
thrlskr
Feb 19, 2007
2
3
41
58K
Jun 2, 2023
by
dtdillon92
Sticky
Compression-Leakdown basic information
got2boostit2
Jun 30, 2013
13
56K
Jun 2, 2023
by
dtdillon92
Sticky
AVCS Gear Cleaning Guide! (Read this if you spun a bearing!)
UrdnotWrexSTi
Apr 5, 2015
2
24
60K
Jan 4, 2023
by
coolgraysti
Sticky
The Official STi engine Venting, A/O Separators, and Catch Cans Thread!!
JZeezSTi
Dec 11, 2008
92
93
94
2K
793K
Feb 2, 2022
by
killerbmotorsport
Sticky
Read this before you create a new thread about BOVs (Blow-off valves)
nandanrp
Mar 21, 2006
6
7
8
159
144K
May 26, 2020
by
RocketRobin
Sticky
Everything you need to know about E85
BAD STI
Sep 24, 2010
4
5
6
112
220K
Feb 22, 2017
by
STiMikeNC
Sticky
Extremely good info for first time turbo owners (Determining Turbo Serviceability)
Ursalog
Aug 9, 2012
18
35K
Oct 3, 2013
by
Jason P.
Sticky
Comprehensive Subaru CEL Code List (XLS File Attached)
Muffnbluff
Feb 15, 2008
2
26
72K
Jul 4, 2012
by
2.5 turbo hyped
Sticky
UPDATED 03/03/10: Planning a turbo build? This is roughly what it will cost you.
TheLimitedProject
Nov 25, 2007
4
5
6
117
99K
Jan 5, 2012
by
R3VOLUTION
S
2015 WRX STI just rebuilt. Started and ran for about 5 seconds and now nothing…
SoobyDoobiDo
4d ago
11
389
12h ago
by
GuusV
Chasing Down a FKL Issue
Tapion1981
2d ago
13
231
20h ago
by
Tapion1981
Garrett Gen 2 turbos
Voodoo Rufus
Dec 13, 2016
2
3
4
188
149K
21h ago
by
Karlot
Blown Head Gasket Next Steps
JohnnyDSti
Mar 20, 2024
39
939
1d ago
by
Entreri913
P
Labor hours for head gaskets
Pault1
Mar 4, 2024
18
699
6d ago
by
ChefPhil
spark plugs
B4RSTiwsnc
Jul 4, 2007
14
3K
6d ago
by
anomalous3
E
2018 STI bypass valve oil leak
EmilG
Mar 16, 2024
31
780
7d ago
by
mcglsr2
1
please help identify this connector
135Hoser
Mar 16, 2024
2
243
Mar 16, 2024
by
135Hoser
D
Weird afr and fluctuating idle
Dylan daly
Feb 22, 2024
23
1K
Mar 6, 2024
by
JohnSub2013sti
V
HELP
Vkirpo
Feb 29, 2024
3
306
Mar 3, 2024
by
Jay11STI
OEM downpipe cat ratings/cell counts
JDM-STI
Dec 7, 2023
35
3K
Mar 2, 2024
by
JDM-STI
The Right Clutch
Jay11STI
Aug 1, 2021
52
16K
Mar 1, 2024
by
FritoPendejo
R
Need help!! JDM EJ207 blown turbo or engine
r5yugo
Jul 2, 2016
8
3K
Feb 28, 2024
by
Devay207
J
Thread of STI Noises
JohnSub2013sti
Nov 26, 2023
4
1K
Feb 26, 2024
by
JohnSub2013sti
Low Mess EJ Oil Change
brandon.raineri
Dec 11, 2023
25
3K
Feb 23, 2024
by
brandon.raineri
Bank 1 Misfire = Bad ECU?
coolgraysti
May 25, 2023
7
1K
Feb 22, 2024
by
nelsonfelgueiras9
Anyone tested the plastic intake manifolder vs. STi aluminum manifold?
daemon
Apr 28, 2008
21
18K
Feb 21, 2024
by
Subie_Go_Vroom
S
05 STi cooling issue
STixSpeed
Nov 22, 2014
18
3K
Feb 19, 2024
by
jaredbownds
Cobb GESI cat
Bdubs1203
Feb 27, 2021
50
21K
Feb 17, 2024
by
Mpbb
Normal wear
hyperblueCH8
Feb 14, 2024
4
875
Feb 15, 2024
by
mcglsr2
P
Quiet down now
PB_Sti
Feb 14, 2024
15
767
Feb 14, 2024
by
anomalous3
what does TGV actually do ??
the ambush
Mar 2, 2007
16
52K
Feb 12, 2024
by
mcglsr2
How much horsepower does it take to peel out?
maxxell
Nov 13, 2005
2
3
4
103
24K
Feb 12, 2024
by
mcglsr2
Anyone make crank scrapers for our engines?
anomalous3
Jan 23, 2024
4
745
Feb 11, 2024
by
mcglsr2
2
Adding fuel damper on a Cobb FPR
2.5_STIDriver
Feb 10, 2024
4
563
Feb 11, 2024
by
Jedi03
C
Is this an STI shortblock?
crit
Jun 15, 2009
10
14K
Feb 11, 2024
by
aacabrera1904
Bad bpv?
anomalous3
Feb 7, 2024
3
745
Feb 8, 2024
by
anomalous3
V
Fuel Injector Brackets of Death
vilebastage
May 24, 2013
15
12K
Feb 6, 2024
by
yamahaSHO
Best Way to Replace Oil Dipstick Tube O-Rings
BJJMark95
Jan 20, 2015
12
16K
Feb 5, 2024
by
ademello388
EJ Oil Pump Data 11mm vs 12mm vs Shimmed
killerbmotorsport
Dec 22, 2021
18
9K
Jan 31, 2024
by
SidewaysIceClaw
Grounding resistance measurements
anomalous3
Jan 27, 2024
5
706
Jan 28, 2024
by
anomalous3
N
2015 STI P0230
Nard-Hund
Jan 25, 2024
2
373
Jan 25, 2024
by
Tapion1981
D
12mm oil pump question
Dylan daly
Jan 22, 2024
11
879
Jan 24, 2024
by
Dylan daly
D
Rebuild options for high-mileage '12 hatch with track use
DougSTi
Jan 23, 2024
5
626
Jan 23, 2024
by
Karlot
F
RA longblock failure
FritoPendejo
Jan 21, 2024
5
771
Jan 21, 2024
by
FritoPendejo
1
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2.5 Liter/Litre Factory Motor
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Discuss the Subaru 2.5L factory motor. Please post exhaust related discussion in the exhaust forum.
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