The landscape of Subaru WRX & STI mods has changed dramatically over the past few years, especially with recent updates affecting how we approach Subaru Tuning. From cold air intake systems to cat back exhaust options, we break down what actually works under the new regulations and what you need to know before modifying your WRX & STI.
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300WHP (VF39/48)
Cobb Accessport or Open source
Cobb SF Intake With Box
3 Port EBCS
Catted Downpipe
Whatever Catback You want
IAG AOS or a Catch Can
350WHP
Cobb Accessport or Open source
Cobb SF Intake With Box
Cobb 4 Bar Map Sensor
3 Port EBCS
Catted Downpipe
Whatever Catback You want
IAG AOS or a Catch Can (Radium is a good option)
AEM 340LPH Fuel Pump
Grimmspeed / ETS TMIC
STI BPV (Crushed) or Aftermarket
ID1050X (TOP FEED)
FP Blue Turbocharger
Grimmspeed / Perrin Up pipe
Perrin 2.4” Silicone Inlet
NGK2309 Spark Plugs
IAG Oil Pan
Koyo Aluminum Radiator
AEM AFR Gauge
AEM Oil Pressure Gauge
400WHP
For stock engine cars this is where I would advise you to stop.
Cobb Accessport or Open source
Cobb SF Intake With Box
Cobb 4 Bar Map Sensor
3 Port EBCS
Catted Downpipe
Whatever Catback You want
IAG AOS or a Catch Can
AEM 340LPH Fuel Pump
FP Blue 10cm / FP Green / BB500 / BCP
ID1050X (Pump Gas)
ID1300 (Flex Fuel) + IBR Flex Fuel Sensor Kit
IAG, Cobb, Radium Fuel Rails
-6 Feed & Return Lines (Engine Bay only)
Aeromotive A1000 FPR
ETS/Perrin/Grimmspeed/Cobb FMIC
ETS/Killer B/Grimmspeed Etc Exhaust Manifold
Hybrid Speed Density Conversion (Iwire / Visconti Tuning)
ACT HDSS Clutch with Stock resurfaced Flywheel
Grimmspeed / Perrin Up pipe
Perrin 2.4” Silicone Inlet
Cobb Tuning BPV
NGK2309 Spark Plugs
Koyo Aluminum Radiator
AEM AFR Gauge
AEM Oil Pressure Gauge
Touch On TGV Deletes & Air Pumps
450WHP
Built engine (Rod + Piston), Talk with a builder and they can advise which setup is good for you. If you want to DIY a good combo for this power is:
- OEM STI Nitrated Crankshaft
- Manley H Tuff Connecting Rods or Brian Crower Rods
- King Pmax Main Bearings
- King Pmax Rod Bearings
- Manley 8.5:1 Sport Compact Pistons
Cylinder Heads
- GSC S1 Camshafts
- Brain Crower SS Spirngs with TI Retainers
- GSC Valve Stem Seals
- JE Pro Seal Headgasket
- ARP2000 or 625+
Cobb Accessport or Open source. Good Point to consider a Standalone
- Link ECU
- Emtron
- Haltech
- If going standalone you would need a Patch Harness to connect the OEM Harness to the new computer.
Cobb SF Intake With Box
Cobb 4 Bar Map Sensor
3 Port EBCS
Catted Downpipe
Whatever Catback You want
IAG AOS or a Catch Can
Walbro 450LPH Fuel Pump (Hardwired, Either DIY or Iwire)
Fp Green 10cm or FP Black
ID1300 (Flex Fuel) + IBR Flex Fuel Sensor Kit
IAG, Cobb, Radium Fuel Rails
-6 Feed & Return Lines (Engine Bay only)
Aeromotive A1000 FPR
ETS/Perrin/Grimmspeed/Cobb FMIC
ETS/Killer B/Grimmspeed Etc Exhaust Manifold
Hybrid Speed Density Conversion (Iwire / Visconti Tuning)
ACT XDSS Clutch with Stock resurfaced Flywheel
PLM EWG Uppipe
Tial 38mm EWG
Tial Q BOV
BBR 3” Hard Inlet or FP 3.3” Inlet
8mm Phenolic Spacers (IAG)
NGK2309 Spark Plugs
Koyo Aluminum Radiator
Fluidamper Crank Pulley
AEM AFR Gauge
AEM Oil Pressure Gauge
500 WHP
Built engine (Rod + Piston), Talk with a builder and they can advise which setup is good for you. If you want to DIY a good combo for this power is:
- OEM STI Nitrated Crankshaft
- Manley H Tuff Connecting Rods or Brian Crower Rods
- King Pmax Main Bearings
- King Pmax Rod Bearings
- Manley 8.5:1 Sport Compact Pistons
Cylinder Heads
- GSC S2 Camshafts
- Brain Crower SS Spirngs with TI Retainers
- GSC Valve Stem Seals
- JE Pro Seal Headgasket
- ARP2000 or 625+ (Will depend on boost level)
Cobb Accessport or Open source. Good Point to consider a Standalone
- Link ECU
- Emtron
- Haltech
- If going standalone you would need a Patch Harness to connect the OEM Harness to the new computer.
Cobb SF Intake With Box
Cobb 4 Bar Map Sensor
3 Port EBCS
Catted Downpipe
Whatever Catback You want
IAG AOS or a Catch Can (Radium is a good option)
Radium Fuel Hanger with X2 Walbro 450 or AEM 340LPH Pumps
FP Black 10cm
AMS Intake Manifold If using a Standalone or Open Source
ID1700 (Flex Fuel) + IBR Flex Fuel Sensor Kit
IAG, Cobb, Radium Fuel Rails
-6 Feed & Return Lines
Aeromotive A1000 FPR
ETS/Perrin/Grimmspeed/Cobb FMIC
ETS/Killer B/Grimmspeed Etc Exhaust Manifold
Hybrid Speed Density Conversion (Iwire / Visconti Tuning)
ACT XDSS Clutch with Stock resurfaced Flywheel
PLM EWG Uppipe
Tial 38mm EWG
Tial Q BOV
BBR 3” Hard Inlet or FP 3.3” Inlet
8mm Phenolic Spacers
NGK2309 Spark Plugs
Koyo Aluminum Radiator
Fluidamper Crank Pulley
AEM AFR Gauge
AEM Oil Pressure Gauge
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