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FB20D - E-Boxer Hybrid (2019+)

Technical discussion of the new 2019+ 2.0L E-Boxer Hybrid
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FB25DI - 2.5L Non-Turbo Direct Injection (2019+)

Technical discussion of the new 2019+ 2.5L Direction Injection naturally aspirated (N/A) powerplant, bolt-on power adders, exhaust options, etc.
576 115K
  • 576
  • 115K

FB25 - 2.5L Non-Turbo (2011- 2018)

Technical discussion of the 2011 - 2018 2.5L naturally aspirated (N/A) powerplant, bolt-on power adders, exhaust options, etc.
15.9K 5.2M
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  • 5.2M

FA20DIT - 2.0L Direct-Injection/Turbo (2014-2018)

Technical discussion of the 2.0L direct-injected/turbocharged engine and any engine and exhaust-related modifications.
13.9K 4.3M
  • 13.9K
  • 4.3M

EJ25 - 2.5L Non-Turbo (1998-2010)

Technical discussion of the 2.5L naturally aspirated (N/A) powerplant, bolt-on power adders, exhaust options, etc.
43.7K 18.1M
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  • 18.1M

EJ25 - 2.5L Turbocharged (2004-2013)

Technical discussion of the 2.5L turbocharged engine and any engine and exhaust-related modifications.
76.6K 19.1M
  • 76.6K
  • 19.1M

EJ20 - 2.0L Non-Turbo

Technical discussion of the 2.0L naturally aspirated (N/A) powerplant, bolt-on power adders, exhaust options, etc.
1K 646K
  • 1K
  • 646K

EJ20 - 2.0L Turbocharged

Technical discussion of the 2.0L turbocharged engine and any engine and exhaust-related modifications.
3.9K 1.7M
  • 3.9K
  • 1.7M

EE20 - 2.0L Diesel

Technical discussion of the 2.0L boxer diesel engine and any engine and exhaust-related modifications.
3.2K 1.7M
  • 3.2K
  • 1.7M

FB20 - 2.0L Non-Turbo (2011+ Euro-spec)

Technical discussion of the new 2011+ Euro-spec 2.0L naturally aspirated (N/A) powerplant, bolt-on power adders, exhaust options, etc.
37 49.5K
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  • 49.5K

Auto Stop / Start

Discussions around this latest feature
494 159K
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  • 159K

Cooling Systems

Technical discussions relating to cooling systems of all models.
1.9K 517K
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Motor Conversions

Technical discussion on engine conversions or swaps.
4.6K 2.4M
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  • 2.4M
(All Years) Sticky The Official Timing Chain Thread
4
8K
 by James Alexander
(All Years) Sticky The "best" motor oils - independently tested and ranked by wear protection
14
3K
 by SierraHotel
Sticky Synthetic Motor Oil Discussion
12 13 14
276
138K
 by adc
Sticky Ongoing polls regarding head gasket problems
2 3
48
124K
 by gibo
(All Years) Sticky Subaru oil filter comparison
2
36
160K
 by flstffxe
Sticky Please post in the correct engine subforums!
1
8K
 by pleiad7
2001 - Turbo Swap in California
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('98-'00) 1998 - Exhaust help - will 2007 wrx exhaust will fit?
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25
 by MY98SF
('01-'02) 2001 - Subaru rumble!
4
90
 by 2.5x_sleeper
('14-'18) 2015 - What are some Single Exit exhaust options for the FXT?
0
64
 by PTD
('09-'13) 2010 - NA 2.5 Cylinder Damage?
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N/A
('09-'13) 2010 - Can’t Decide on which exhaust to get?
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N/A
('06-'08) 2008 - OK to remove heat shield above muffler?
3
688
 by tcsubie24
2011 Impreza engine into 2009 Forester?
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N/A
('14-'18) 2017 - Looking for a little louder exhaust - WRX mid-pipe or muffler shop?
5
405
 by Natedog
('09-'13) 2009 - Exhaust upgrade - from a WRX to the N/A Forester?
1
139
 by Snow3d
('06-'08) 2006 - Upstream air fuel ratio sensor failed after 29k miles?
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N/A
('19+) 2019 - Exhaust Tip?
5
755
 by Dogs
('19+) 2020 - What Fumoto valve?
6
715
 by Sdcerreta
('14-'18) 2016 - Fuel smell while driving and hesitate starting?
0
194
 by Kmurph35
('98-'00) 1998 - What year ran a MAF vs. MAP sensor?
2
25
42K
 by SUBIrez
('03-'05) 04 forester back box. what will fit?
0
142
 by mrman33
('09-'13) 2013 - Will 2016 WRX Sedan Exhaust fit?
0
170
 by kdesroches
('03-'05) 2004 - Vacuum and Coolant Hose Replacement
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N/A
(All Years) How to Idle Re-Learn after Battery Disconnect
2 3 4
66
426K
 by Quadraria10
Costco Kirkland brand synthetic motor oil
6
6K
 by bobakman
('09-'13) Right side muffler
4
232
 by The Mandalorian
('98-'00) 1999 - Exhaust suggestions/advice?
0
164
 by Boobaru714
('14-'18) 2015 - Diagram of the exhaust system and heat shields?
6
915
 by Theseus161
('03-'05) 2003 - AT Oil Temp Flashing After Motor Swap?
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('06-'08) 2006 forester xt FMIC
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EJ205 swap
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Need engine - will 2003 wrx replace 2004 XT?
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N/A
Cylinder Bore Wear difference - flat four engine vs. vertical straight four engine?
4
444
 by slothman
('09-'13) 2010 - Engine Seized. Please advice on where to order one and if I should go new or used... Thank you in advance!!
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('09-'13) 2010 - Cold air intake
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('14-'18) Invidia R400 (wrx cat back) on SJ XT?
1
448
 by twinturbozs
('03-'05) 2004 - Extended Exhaust Hangers Info
2
23
35K
 by VanderBosch
('09-'13) 2010 - Am I being too picky? About muffler finish?
8
881
 by SubaruDan
('06-'08) 2007 - Off road exhaust mod for slightly better ground clearance?
1
583
 by Kevin
('06-'08) 2008 X - Header compatibility (headers all the way to the tip)?
0
442
 by Carver Engstrom
Engine and Exhaust Technical discussion of engine and exhaust-related topics - stock and aftermarket. Turbo, N/A, and diesel subforums inside.
171.8K posts
58.1M views
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