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U

Sticky **PSA** So you have a >400whp fully built setup: Protecting Your Investment

3 4 5
83
76K
 by yamahaSHO
T

Sticky To Read If You're Considering Forged Pistons

18
16K
 by S2000_Europe
Kevin

Sticky Subaru 2.5L Engine/Motor Building 101

3 4 5
86
124K
 by user1029
warrenn.brandon

New Build Starts!

9
429
 by mheyman
JustANobody

Suggestions on mods/parts

12
559
 by Karlot
J

STI Lurching at WOT Above 16psi

2
34
1K
 by JohnSub2013sti
B

Ej257 swapped Bugeye doesn't start.. timing?

8
775
 by Bugg3y3
williamsartor06

Looking for a build recipe for an ej207 out of a JDM 2004 STI.

4
411
 by JA04STI
K

Turbo sizing for 450whp?

2
21
1K
 by yamahaSHO
I

Turbo Intake/Inlet Issues

18
807
 by NoncarbonatedClack
E

Built Motor Misfires and no power

8
541
 by JohnSub2013sti
YesOfficer

2012 STI build surging at warm idle

2
29
2K
 by YesOfficer
Mich13sti

Thinking about some possible last minute additions to my mod list

7
1K
 by Zerohe
b.dedios8491

What’s the best size wastegate for my build , please help, any opinion, comments are welcome . Going TIAL OF COURSE

2
21
1K
 by praha-sti
coolgraysti

Outfront Motorsports “Grocery Getter” Shortblock

2 3
45
4K
 by xpystchrisx
R

Bought a 2010 WRX STI with a blown motor, now what?!

4
799
 by Karlot
G

Built Motor Cam position sensor code/problems

4
394
 by ghosti14
Stocking.13STI

Forged internals but stock ej257 halves

16
1K
 by Karlot
A

New build with misfires please help

2
27
8K
 by praha-sti
TorqueStable

NEW GRIMMSPEED BB500 TURBO ?

2 3 4
72
11K
 by Mich13sti
STiBriT

FP Black build: What else do I need?

9
6K
 by b.dedios8491
TannerStnki

whistling at idle.

7
2K
 by TannerStnki
J

IAG Stage 2 Block

2
22
6K
 by mheyman
williamsartor06

What is this in the engine bay?

13
2K
 by Scargo
21STI

Autocross Build Completed

14
1K
 by nissanfanatic
21STI

A/C Vent issue

4
605
 by 21STI
P

04 WRX wagon, need mechanic in st.louis

6
493
 by Bwill9886
praha-sti

ATI Damper Install Question?

19
1K
 by praha-sti
TenTurbo

Low performance on dyno after the build.....very confused!

2
27
4K
 by Karlot
purekeyz

Very Bad Leak Down Test and Okay Compression Test - Need to figure out what is wrong.

2 3 4
62
4K
 by praha-sti
got2boostit2

Anyone Used Broken Boxer Repair Engines?

7
7K
 by Karlot
405HP_Z06

EJ25 706 Series Case Bore Surface Texture

0
632
 by 405HP_Z06
warrenn.brandon

Built Motor Rally Spec 07 STI

2
20
2K
 by warrenn.brandon
muller_777

ALL cylinder misfire, new motor

19
3K
 by muller_777
benrdoherty

Aftermarket J-pipe question

2
489
 by Karlot
TheFlamingNipp

Has anyone setup their car with the ETS Front Mount Intercooler for 2015+ STIs along with Cobb Redline Intake?

11
2K
 by TheFlamingNipp
Punisher7

2015 STi 550-600whp+ Build In Process

2
23
4K
 by Punisher7
S

Smoke on start up and idle with new motor

9
828
 by STI123
Built Motor Discussion
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