• EJ "Bolt On" Parts I Recommend: 

  • IAG/Cobb AOS (this is the ONLY AOS I recommend) this should be considered a must on any modified Subaru

  • 1050x / 1300x / 1700x injectors 

  • Cobb Fuel Pressure Regulator (this is a MUST for aftermarket injectors on 08+ STI)

  • AEM340 ( for 400+whp you will need more fuel - Visconti 450/525 / Radium Hanger (multiple choices depending on hp) / Radium Surge Tank )

  • 3 port EBCS (BST/cobb/ grimmspeed etc) 

  • BST Flex Fuel Sensor Kit 

  • Bigger TMIC 

** this setup will usually see ~365whp/~380wtq on E85 and ~300whp/~325wtq on 91oct **

• EJ 400whp+ : 

  • Cobb 20g is a great stock location turbo for ~420whp/ ~450wtq on E85 

  • Blouch Dominator 3.0XT-R Ball Bearing Turbocharger is my personal favorite for higher HP stock location turbo. 

    • This turbo on E85 will easily see 480+whp/480+wtq while still having great spool time. Best bang for buck when not wanting to go rotated. ( FMIC is highly recommended. Will a TMIC "work"? Technically Yes, but it WILL get hot and it will do so very quickly. This is not a good idea. ) 

  • Equal Length Headers (Killer B / MAPerformace / IAG / Tomei etc)

• EJ Notes:

  • When switching to FMIC, Speed Density Kit is almost always a necessity. 

  • EGR Delete / TGV delete not always necessary when going higher horsepower and flex fuel

  • Rotated Turbos: 

    • Garrett 30/35 size turbos are a common choice and make good power 

    • Precision 5858 is one of my favorite sub 600whp rotated turbos. It spools very quickly and makes north of 500whp 

    • Precision 6466 is what I would recommend when wanting to make over 650whp. It spools relatively quickly for what it is and is capable of 800+whp 

• FA20DIT "Bolt On" Parts I Recommend:

  • EcuTek Ecu Connect Kit

  • IAG/Cobb AOS (this is the ONLY AOS I recommend) this should be considered a must on any modified Subaru

  • DW300c fuel pump ( 9-307-1010 ) ** yes, the AEM340 will work, but for FA's I prefer the DW300c

  • BST Flex Fuel Sensor Kit

  • Bigger TMIC  (Cobb or Garrett)  *I do not recommend TurboXS/Mishimoto/MAPerformance/etc*

  • FMIC - Cobb/ETS/GrimmSpeed

  • EBCS (electronic boost control solenoid) - Cobb or GrimmSpeed

  • Intakes - Cobb/GrimmSpeed 

  • BPV/BOV - I don't recommend this unless you have an aftermarket turbo. Stock BPV works just fine. You gain no performance from aftermarket BPVs or BOVs . 

  • Turbos:

    • FP Blue 450whp+ ( will need additional fueling - Nostrum HPFP/ Port Injection / etc )             

    • SoCal v3 400-420whp ( will need additional fueling - Nostrum HPFP/ Port Injection / etc )         

  • Expected Power:

    • 91oct/TMIC/EBCS/TBE ~ 275whp/300wtq 

    • Flex Fuel/TMIC/EBCS/TBE ~ 330whp/340wtq

    • Flex Fuel/FMIC/EBCS/TBE  *Stock Block* ~350whp/350wtq  -- Built Motor ~380whp/375wtq 

    • Flex Fuel/FMIC/EBCS/TBE/FP Blue/HPFP/Built Motor - ~430+whp/400+wtq