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U
Sticky
**PSA** So you have a >400whp fully built setup: Protecting Your Investment
user1029
Feb 9, 2014
3
4
5
83
76K
9 mo ago
by
yamahaSHO
T
Sticky
To Read If You're Considering Forged Pistons
Toivonen
May 7, 2015
18
16K
Sep 13, 2018
by
S2000_Europe
Sticky
Subaru 2.5L Engine/Motor Building 101
Kevin
Dec 21, 2008
3
4
5
86
124K
Dec 2, 2014
by
user1029
New Build Starts!
warrenn.brandon
14 d ago
9
429
7 d ago
by
mheyman
Suggestions on mods/parts
JustANobody
20 d ago
12
559
19 d ago
by
Karlot
J
STI Lurching at WOT Above 16psi
JohnSub2013sti
1 mo ago
2
34
1K
23 d ago
by
JohnSub2013sti
B
Ej257 swapped Bugeye doesn't start.. timing?
Bugg3y3
2 mo ago
8
775
29 d ago
by
Bugg3y3
Looking for a build recipe for an ej207 out of a JDM 2004 STI.
williamsartor06
1 mo ago
4
411
1 mo ago
by
JA04STI
K
Turbo sizing for 450whp?
Kojira_STI
1 mo ago
2
21
1K
1 mo ago
by
yamahaSHO
I
Turbo Intake/Inlet Issues
Itsmyfirsttime
2 mo ago
18
807
2 mo ago
by
NoncarbonatedClack
E
Built Motor Misfires and no power
epicdonut
2 mo ago
8
541
2 mo ago
by
JohnSub2013sti
2012 STI build surging at warm idle
YesOfficer
3 mo ago
2
29
2K
2 mo ago
by
YesOfficer
Thinking about some possible last minute additions to my mod list
Mich13sti
4 mo ago
7
1K
2 mo ago
by
Zerohe
What’s the best size wastegate for my build , please help, any opinion, comments are welcome . Going TIAL OF COURSE
b.dedios8491
2 mo ago
2
21
1K
2 mo ago
by
praha-sti
Outfront Motorsports “Grocery Getter” Shortblock
coolgraysti
3 mo ago
2
3
45
4K
2 mo ago
by
xpystchrisx
R
Bought a 2010 WRX STI with a blown motor, now what?!
R8ted_STI
3 mo ago
4
799
3 mo ago
by
Karlot
G
Built Motor Cam position sensor code/problems
ghosti14
3 mo ago
4
394
3 mo ago
by
ghosti14
Forged internals but stock ej257 halves
Stocking.13STI
3 mo ago
16
1K
3 mo ago
by
Karlot
A
New build with misfires please help
alozacha
Nov 17, 2020
2
27
8K
3 mo ago
by
praha-sti
NEW GRIMMSPEED BB500 TURBO ?
TorqueStable
Mar 17, 2022
Poll
2
3
4
72
11K
4 mo ago
by
Mich13sti
FP Black build: What else do I need?
STiBriT
Jun 15, 2012
9
6K
4 mo ago
by
b.dedios8491
whistling at idle.
TannerStnki
4 mo ago
7
2K
4 mo ago
by
TannerStnki
J
IAG Stage 2 Block
Jermaine11423
Mar 25, 2021
2
22
6K
4 mo ago
by
mheyman
What is this in the engine bay?
williamsartor06
5 mo ago
13
2K
4 mo ago
by
Scargo
Autocross Build Completed
21STI
6 mo ago
14
1K
5 mo ago
by
nissanfanatic
A/C Vent issue
21STI
5 mo ago
4
605
5 mo ago
by
21STI
P
04 WRX wagon, need mechanic in st.louis
PeterJu
5 mo ago
6
493
5 mo ago
by
Bwill9886
ATI Damper Install Question?
praha-sti
6 mo ago
19
1K
5 mo ago
by
praha-sti
Low performance on dyno after the build.....very confused!
TenTurbo
Oct 31, 2021
2
27
4K
6 mo ago
by
Karlot
Very Bad Leak Down Test and Okay Compression Test - Need to figure out what is wrong.
purekeyz
7 mo ago
2
3
4
62
4K
6 mo ago
by
praha-sti
Anyone Used Broken Boxer Repair Engines?
got2boostit2
Mar 14, 2016
7
7K
7 mo ago
by
Karlot
EJ25 706 Series Case Bore Surface Texture
405HP_Z06
7 mo ago
0
632
7 mo ago
by
405HP_Z06
Built Motor Rally Spec 07 STI
warrenn.brandon
7 mo ago
2
20
2K
7 mo ago
by
warrenn.brandon
ALL cylinder misfire, new motor
muller_777
Jan 2, 2022
19
3K
8 mo ago
by
muller_777
Aftermarket J-pipe question
benrdoherty
8 mo ago
2
489
8 mo ago
by
Karlot
Has anyone setup their car with the ETS Front Mount Intercooler for 2015+ STIs along with Cobb Redline Intake?
TheFlamingNipp
8 mo ago
11
2K
8 mo ago
by
TheFlamingNipp
2015 STi 550-600whp+ Build In Process
Punisher7
Jan 17, 2022
2
23
4K
8 mo ago
by
Punisher7
S
Smoke on start up and idle with new motor
STI123
9 mo ago
9
828
9 mo ago
by
STI123
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