Skip to content

TUNING
SERVICE
APPAREL
AUDI
BMW
- M2
  - G87
- M3
  - G Series
  - F Series
- M4
  - G Series
  - F Series
- M240i
  - G42
  - F22
- M340i
  - G20
- M440i
  - G22
LAMBORGHINI
- Huracan (all)
- Urus
MITSUBISHI
- LANCER EVO
NISSAN
- R35 GT-R
- R32 GT-R
- R33 GT-R
- R34 GT-R
SUBARU
- WRX
  - 2022+
  - 2015-2021
  - 2011-2014
  - 2008-2010
  - 2006-2007
  - 2004-2005
  - 2002-2003
- STI
  - 2018-2021
  - 2015-2017
  - 2011-2014
  - 2008-2010
  - 2007
  - 2006
  - 2005
  - 2004
- BRZ
  - 2022+
  - 2012-2020
- FORESTER XT
- LEGACY GT
- OUTBACK XT
  - 2008-2009
  - 2005-2007
TOYOTA
- GR COROLLA
  - 2023+
- GR SUPRA
  - 2020+
- GR86
  - 2022+
- 86
  - 2012-2020
WHEELS/TIRES
- Wheels
  - By Brand
    - Volk
    - Work
    - Gram Lights
    - Enkei
    - Kansei
  - 5x114.3
  - 5x100
- Tires
- Lug Nuts
  - M12x1.25
  - M12x1.5
- Wheel Accessories
LIGHTING
UNIVERSAL

Country/region

Country/region

Facebook
Instagram
TikTok
YouTube

TUNING
SERVICE
APPAREL
AUDI
BMW
- M2
  - G87
- M3
  - G Series
  - F Series
- M4
  - G Series
  - F Series
- M240i
  - G42
  - F22
- M340i
  - G20
- M440i
  - G22
LAMBORGHINI
- Huracan (all)
- Urus
MITSUBISHI
- LANCER EVO
NISSAN
- R35 GT-R
- R32 GT-R
- R33 GT-R
- R34 GT-R
SUBARU
- WRX
  - 2022+
  - 2015-2021
  - 2011-2014
  - 2008-2010
  - 2006-2007
  - 2004-2005
  - 2002-2003
- STI
  - 2018-2021
  - 2015-2017
  - 2011-2014
  - 2008-2010
  - 2007
  - 2006
  - 2005
  - 2004
- BRZ
  - 2022+
  - 2012-2020
- FORESTER XT
- LEGACY GT
- OUTBACK XT
  - 2008-2009
  - 2005-2007
TOYOTA
- GR COROLLA
  - 2023+
- GR SUPRA
  - 2020+
- GR86
  - 2022+
- 86
  - 2012-2020
WHEELS/TIRES
- Wheels
  - By Brand
    - Volk
    - Work
    - Gram Lights
    - Enkei
    - Kansei
  - 5x114.3
  - 5x100
- Tires
- Lug Nuts
  - M12x1.25
  - M12x1.5
- Wheel Accessories
LIGHTING
UNIVERSAL

Search

Item added to your cart

View cart

Collection: 2018-2021 STI All Parts

Sort by:

1187 products

Filter:

Product type (0)

Product type

Air Boxes (3 products)
Air Intake + Accessories (11 products)
Alternator Mount Kit (2 products)
Antennas + Accessories (1 product)
Axle Back (3 products)
Battery Tiedowns (9 products)
Boost Controllers + Accessories (6 products)
BOV and BPV (26 products)
Brackets (3 products)
Brake Calipers + Rebuild (2 products)
Brake Hardware (2 products)
Brake Pads (16 products)
Brake Rotors (7 products)
Bushing Kits (27 products)
Camber Kits (2 products)
Cat Back Exhaust (23 products)
Clutch Discs (4 products)
Clutch Kits - Multi (9 products)
Clutch Kits - Single (13 products)
Coilovers + Accessories (7 products)
Connecting Pipes (2 products)
Control Arms (7 products)
Coolant Reservoirs (4 products)
Cylinder Head + Sets (18 products)
Cylinder Head Gaskets (2 products)
Cylinder Head Studs + Bolts (2 products)
Diff Mounts + Braces + Bushings (8 products)
Dipsticks (9 products)
Downpipes (2 products)
ECU Tunes (4 products)
Engine Covers (6 products)
Engine Gaskets + Sets (1 product)
Engine Long Block (10 products)
Engine Mounts (31 products)
Engine Oil Change Kit (2 products)
Engine Short Block (7 products)
Exhaust Adapters (7 products)
Exhaust Gaskets (4 products)
Exhaust Hangers (2 products)
Exhaust Manifolds + Accessories (5 products)
Exterior Trim (7 products)
Fans & Shrouds (2 products)
Flanges (3 products)
Flywheels (4 products)
Fog Lights (2 products)
Fuel Injectors + Accessories (7 products)
Fuel Lines (61 products)
Fuel Pressure Regulators + Accessories (1 product)
Fuel Pumps + Hangers (11 products)
Fuel Rails (8 products)
Hardware (6 products)
Heat Shields (3 products)
Hoses (5 products)
Ignition Coils (2 products)
Intercoolers + Accessories (10 products)
LED (1 product)
License Plate Relocation (5 products)
Lowering Springs (7 products)
Manual Transmission Mount (6 products)
Manual Transmission Synchro Assembly (2 products)
Mud Flaps (18 products)
Multi-Purpose Light Bulb (2 products)
Oil Caps (9 products)
Oil Catch Can (1 product)
Oil Coolers (5 products)
Oil Filters (7 products)
Oil Pan + Baffles + Gaskets (6 products)
Oil Separators (6 products)
Oil Strainers + Gaskets (1 product)
Power Packages (10 products)
Pulleys - Crank, Underdrive (7 products)
Radiator Caps (6 products)
Radiator Hoses (2 products)
Radiator Shrouds (10 products)
Radiator Stays (8 products)
Radiators (3 products)
Seat Brackets & Frames (2 products)
Shifter Bushings (10 products)
Shifters (3 products)
Shocks and Struts (4 products)
Spark Plugs (3 products)
Strut Bars (5 products)
Super Core Assemblies (4 products)
Suspension Arms & Components (6 products)
Sway Bar Bushings (3 products)
Sway Bar Endlinks (9 products)
Sway Bars (5 products)
Throttle Bodies + Accessories (1 product)
Timing Belts + Components (7 products)
Tow Hooks (9 products)
Transmission Mounts (5 products)
Turbine Housings (6 products)
Turbo Heat Management (1 product)
Turbo Kits (2 products)
Turbo Oil Lines + Accessories (1 product)
Turbochargers (8 products)
Wastegate + Accessories (9 products)
Wheel Spacers & Adapters (7 products)
Wheels (289 products)
Wheels - Cast (189 products)

Air Boxes (3 products)
Air Intake + Accessories (11 products)
Alternator Mount Kit (2 products)
Antennas + Accessories (1 product)
Axle Back (3 products)
Battery Tiedowns (9 products)
Boost Controllers + Accessories (6 products)
BOV and BPV (26 products)
Brackets (3 products)
Brake Calipers + Rebuild (2 products)
Brake Hardware (2 products)
Brake Pads (16 products)
Brake Rotors (7 products)
Bushing Kits (27 products)
Camber Kits (2 products)
Cat Back Exhaust (23 products)
Clutch Discs (4 products)
Clutch Kits - Multi (9 products)
Clutch Kits - Single (13 products)
Coilovers + Accessories (7 products)
Connecting Pipes (2 products)
Control Arms (7 products)
Coolant Reservoirs (4 products)
Cylinder Head + Sets (18 products)
Cylinder Head Gaskets (2 products)
Cylinder Head Studs + Bolts (2 products)
Diff Mounts + Braces + Bushings (8 products)
Dipsticks (9 products)
Downpipes (2 products)
ECU Tunes (4 products)
Engine Covers (6 products)
Engine Gaskets + Sets (1 product)
Engine Long Block (10 products)
Engine Mounts (31 products)
Engine Oil Change Kit (2 products)
Engine Short Block (7 products)
Exhaust Adapters (7 products)
Exhaust Gaskets (4 products)
Exhaust Hangers (2 products)
Exhaust Manifolds + Accessories (5 products)
Exterior Trim (7 products)
Fans & Shrouds (2 products)
Flanges (3 products)
Flywheels (4 products)
Fog Lights (2 products)
Fuel Injectors + Accessories (7 products)
Fuel Lines (61 products)
Fuel Pressure Regulators + Accessories (1 product)
Fuel Pumps + Hangers (11 products)
Fuel Rails (8 products)
Hardware (6 products)
Heat Shields (3 products)
Hoses (5 products)
Ignition Coils (2 products)
Intercoolers + Accessories (10 products)
LED (1 product)
License Plate Relocation (5 products)
Lowering Springs (7 products)
Manual Transmission Mount (6 products)
Manual Transmission Synchro Assembly (2 products)
Mud Flaps (18 products)
Multi-Purpose Light Bulb (2 products)
Oil Caps (9 products)
Oil Catch Can (1 product)
Oil Coolers (5 products)
Oil Filters (7 products)
Oil Pan + Baffles + Gaskets (6 products)
Oil Separators (6 products)
Oil Strainers + Gaskets (1 product)
Power Packages (10 products)
Pulleys - Crank, Underdrive (7 products)
Radiator Caps (6 products)
Radiator Hoses (2 products)
Radiator Shrouds (10 products)
Radiator Stays (8 products)
Radiators (3 products)
Seat Brackets & Frames (2 products)
Shifter Bushings (10 products)
Shifters (3 products)
Shocks and Struts (4 products)
Spark Plugs (3 products)
Strut Bars (5 products)
Super Core Assemblies (4 products)
Suspension Arms & Components (6 products)
Sway Bar Bushings (3 products)
Sway Bar Endlinks (9 products)
Sway Bars (5 products)
Throttle Bodies + Accessories (1 product)
Timing Belts + Components (7 products)
Tow Hooks (9 products)
Transmission Mounts (5 products)
Turbine Housings (6 products)
Turbo Heat Management (1 product)
Turbo Kits (2 products)
Turbo Oil Lines + Accessories (1 product)
Turbochargers (8 products)
Wastegate + Accessories (9 products)
Wheel Spacers & Adapters (7 products)
Wheels (289 products)
Wheels - Cast (189 products)

Brand (0)

Brand

Color (0)

Color

Amber yellow (2 products)
Black (76 products)
Blue (39 products)
Bronze (60 products)
Cool White (1 product)
Gold (6 products)
Green (3 products)
Grey (1 product)
Gunmetal (31 products)
Pure white (2 products)
Red (7 products)
Silver (41 products)
White (56 products)

Amber yellow (2 products)
Black (76 products)
Blue (39 products)
Bronze (60 products)
Cool White (1 product)
Gold (6 products)
Green (3 products)
Grey (1 product)
Gunmetal (31 products)
Pure white (2 products)
Red (7 products)
Silver (41 products)
White (56 products)

Price

The highest price is $18,199.99

$

From

To

Availability (0)

Availability

In stock (1075 products)
Out of stock (112 products)

In stock (1075 products)
Out of stock (112 products)

Sort by:

Filter and sort Filter

Filter and sort

Filter

1187 products

Product type

Air Boxes (3 products)
Air Intake + Accessories (11 products)
Alternator Mount Kit (2 products)
Antennas + Accessories (1 products)
Axle Back (3 products)
Battery Tiedowns (9 products)
Boost Controllers + Accessories (6 products)
BOV and BPV (26 products)
Brackets (3 products)
Brake Calipers + Rebuild (2 products)
Brake Hardware (2 products)
Brake Pads (16 products)
Brake Rotors (7 products)
Bushing Kits (27 products)
Camber Kits (2 products)
Cat Back Exhaust (23 products)
Clutch Discs (4 products)
Clutch Kits - Multi (9 products)
Clutch Kits - Single (13 products)
Coilovers + Accessories (7 products)
Connecting Pipes (2 products)
Control Arms (7 products)
Coolant Reservoirs (4 products)
Cylinder Head + Sets (18 products)
Cylinder Head Gaskets (2 products)
Cylinder Head Studs + Bolts (2 products)
Diff Mounts + Braces + Bushings (8 products)
Dipsticks (9 products)
Downpipes (2 products)
ECU Tunes (4 products)
Engine Covers (6 products)
Engine Gaskets + Sets (1 products)
Engine Long Block (10 products)
Engine Mounts (31 products)
Engine Oil Change Kit (2 products)
Engine Short Block (7 products)
Exhaust Adapters (7 products)
Exhaust Gaskets (4 products)
Exhaust Hangers (2 products)
Exhaust Manifolds + Accessories (5 products)
Exterior Trim (7 products)
Fans & Shrouds (2 products)
Flanges (3 products)
Flywheels (4 products)
Fog Lights (2 products)
Fuel Injectors + Accessories (7 products)
Fuel Lines (61 products)
Fuel Pressure Regulators + Accessories (1 products)
Fuel Pumps + Hangers (11 products)
Fuel Rails (8 products)
Hardware (6 products)
Heat Shields (3 products)
Hoses (5 products)
Ignition Coils (2 products)
Intercoolers + Accessories (10 products)
LED (1 products)
License Plate Relocation (5 products)
Lowering Springs (7 products)
Manual Transmission Mount (6 products)
Manual Transmission Synchro Assembly (2 products)
Mud Flaps (18 products)
Multi-Purpose Light Bulb (2 products)
Oil Caps (9 products)
Oil Catch Can (1 products)
Oil Coolers (5 products)
Oil Filters (7 products)
Oil Pan + Baffles + Gaskets (6 products)
Oil Separators (6 products)
Oil Strainers + Gaskets (1 products)
Power Packages (10 products)
Pulleys - Crank, Underdrive (7 products)
Radiator Caps (6 products)
Radiator Hoses (2 products)
Radiator Shrouds (10 products)
Radiator Stays (8 products)
Radiators (3 products)
Seat Brackets & Frames (2 products)
Shifter Bushings (10 products)
Shifters (3 products)
Shocks and Struts (4 products)
Spark Plugs (3 products)
Strut Bars (5 products)
Super Core Assemblies (4 products)
Suspension Arms & Components (6 products)
Sway Bar Bushings (3 products)
Sway Bar Endlinks (9 products)
Sway Bars (5 products)
Throttle Bodies + Accessories (1 products)
Timing Belts + Components (7 products)
Tow Hooks (9 products)
Transmission Mounts (5 products)
Turbine Housings (6 products)
Turbo Heat Management (1 products)
Turbo Kits (2 products)
Turbo Oil Lines + Accessories (1 products)
Turbochargers (8 products)
Wastegate + Accessories (9 products)
Wheel Spacers & Adapters (7 products)
Wheels (289 products)
Wheels - Cast (189 products)

Clear

Brand

Clear

Color

Amber yellow (2 products)
Black (76 products)
Blue (39 products)
Bronze (60 products)
Cool White (1 products)
Gold (6 products)
Green (3 products)
Grey (1 products)
Gunmetal (31 products)
Pure white (2 products)
Red (7 products)
Silver (41 products)
White (56 products)

Clear

Price

The highest price is $18,199.99

$

From

$

To

Clear

Availability

In stock (1075 products)
Out of stock (112 products)

Clear

Sort by:

Remove all

1187 products

Torque Solution Rear Lower Control Arms 2008+ Subaru WRX/STi / 2013+ Scion FR-S/Subaru BRZ

Torque Solution Rear Lower Control Arms 2008+ Subaru WRX/STi / 2013+ Scion FR-S/Subaru BRZ

Regular price $688.88 USD

Regular price Sale price $688.88 USD
Unit price per
Torque Solution Subaru Stock Downpipe to 3in Aftermarket 3in Catback Exhaust Adapter

Torque Solution Subaru Stock Downpipe to 3in Aftermarket 3in Catback Exhaust Adapter

Regular price $55.54 USD

Regular price Sale price $55.54 USD
Unit price per
Torque Solution Subaru 3in Aftermarkert Downpipe To OEM Catback Exhaust Adapter

Torque Solution Subaru 3in Aftermarkert Downpipe To OEM Catback Exhaust Adapter

Regular price $55.54 USD

Regular price Sale price $55.54 USD
Unit price per
Torque Solution -10AN Turbo Oil Return Fitting Subaru EJ All Years

Torque Solution -10AN Turbo Oil Return Fitting Subaru EJ All Years

Regular price $55.54 USD

Regular price Sale price $55.54 USD
Unit price per
Torque Solution Subaru EJ -10AN Turbo Oil Return Line Kit

Torque Solution Subaru EJ -10AN Turbo Oil Return Line Kit

Regular price $138.88 USD

Regular price Sale price $138.88 USD
Unit price per
Torque Solution Pitch Stop Brace: 2015+ Subaru WRX/STI

Torque Solution Pitch Stop Brace: 2015+ Subaru WRX/STI

Regular price $322.21 USD

Regular price Sale price $322.21 USD
Unit price per
Torque Solution Rear Differential Bushings: Subaru Wrx & Sti 2008+ / Forester 2009-2013

Torque Solution Rear Differential Bushings: Subaru Wrx & Sti 2008+ / Forester 2009-2013

Regular price $59.99 USD

Regular price Sale price $59.99 USD
Unit price per
Torque Solution Rear Subframe Bushings (Race) - 2015+ Subaru WRX / STI

Torque Solution Rear Subframe Bushings (Race) - 2015+ Subaru WRX / STI

Regular price $72.21 USD

Regular price Sale price $72.21 USD
Unit price per
Torque Solution Braided Fuel Line Kit for -6 Aeromotive FPR: Subaru WRX 02-14 / Subaru STI 07-18

Torque Solution Braided Fuel Line Kit for -6 Aeromotive FPR: Subaru WRX 02-14 / Subaru STI 07-18

Regular price $255.55 USD

Regular price Sale price $255.55 USD
Unit price per
Torque Solution Braided Fuel Line Kit for -6 Aeromotive FPR & Flex Fuel Kit - 02-14 Subaru WRX

Torque Solution Braided Fuel Line Kit for -6 Aeromotive FPR & Flex Fuel Kit - 02-14 Subaru WRX

Regular price $333.32 USD

Regular price Sale price $333.32 USD
Unit price per
Torque Solution Shifter Linkage Bushings: 06-13 Subaru WRX & STi

Torque Solution Shifter Linkage Bushings: 06-13 Subaru WRX & STi

Regular price $33.32 USD

Regular price Sale price $33.32 USD
Unit price per
Torque Solution Shifter Pivot Bushings: 04-14 Subaru STi

Torque Solution Shifter Pivot Bushings: 04-14 Subaru STi

Regular price $22.21 USD

Regular price Sale price $22.21 USD
Unit price per
Torque Solution Shifter Linkage & Pivot Bushings Combo: 06-14 Subaru STi

Torque Solution Shifter Linkage & Pivot Bushings Combo: 06-14 Subaru STi

Regular price $52.21 USD

Regular price Sale price $52.21 USD
Unit price per
Torque Solution Complete Shifter Bushing Combo Kit: 06-14 Subaru STi

Torque Solution Complete Shifter Bushing Combo Kit: 06-14 Subaru STi

Regular price $111.10 USD

Regular price Sale price $111.10 USD
Unit price per
Torque Solution Greddy Blow Off Valve Adapter: Subaru WRX 02-07 & 04-12 STI

Torque Solution Greddy Blow Off Valve Adapter: Subaru WRX 02-07 & 04-12 STI

Regular price $42.21 USD

Regular price Sale price $42.21 USD
Unit price per
Torque Solution Greddy Blow Off Valve and Recirc Adapter: Subaru WRX 02-07 & 04-14 STI

Torque Solution Greddy Blow Off Valve and Recirc Adapter: Subaru WRX 02-07 & 04-14 STI

Regular price $55.54 USD

Regular price Sale price $55.54 USD
Unit price per
Torque Solution HKS BOV Adapter Flange: Subaru WRX / STi

Torque Solution HKS BOV Adapter Flange: Subaru WRX / STi

Regular price $42.21 USD

Regular price Sale price $42.21 USD
Unit price per
Torque Solution HKS BOV Adapter Flange w/ Plug: Subaru WRX / STi

Torque Solution HKS BOV Adapter Flange w/ Plug: Subaru WRX / STi

Regular price $49.99 USD

Regular price Sale price $49.99 USD
Unit price per
Torque Solution 06-15 Subaru WRX / 06-16 WRX STi Engine Mount Plates

Torque Solution 06-15 Subaru WRX / 06-16 WRX STi Engine Mount Plates

Regular price $111.10 USD

Regular price Sale price $111.10 USD
Unit price per
Torque Solution Tial Blow Off Valve Adapter w/ Plug: Subaru WRX / STi 2002-2013

Torque Solution Tial Blow Off Valve Adapter w/ Plug: Subaru WRX / STi 2002-2013

Regular price $49.99 USD

Regular price Sale price $49.99 USD
Unit price per
Torque Solution Billet Aluminum 1.25in. Bypass Plug: Universal & EVO/WRX/STi

Torque Solution Billet Aluminum 1.25in. Bypass Plug: Universal & EVO/WRX/STi

Regular price $8.88 USD

Regular price Sale price $8.88 USD
Unit price per
Torque Solution Forged Aluminum Wheel Spacer Subaru 56mm Hub 5x114.3 - 20mm

Torque Solution Forged Aluminum Wheel Spacer Subaru 56mm Hub 5x114.3 - 20mm

Regular price $199.99 USD

Regular price Sale price $199.99 USD
Unit price per
Turbosmart BOV Kompact Dual Port - 01-05 Subaru WRX

Sale

Turbosmart BOV Kompact Dual Port - 01-05 Subaru WRX

Regular price $234.95 USD

Regular price ~~$261.06 USD~~ Sale price $234.95 USD
Unit price per

Sale
Turbosmart BOV Kompact Plumb Back - Subaru

Sale

Turbosmart BOV Kompact Plumb Back - Subaru

Regular price $186.95 USD

Regular price ~~$207.72 USD~~ Sale price $186.95 USD
Unit price per

Sale

1
…
8
9
10
11
12
…
50

Contact Us

sales@circuitdemon.com

585-420-6920

640 East Main Street

Palmyra, NY 14522

Open Monday through Friday 9am-5pm

Menu

The New Circuit Demon
Shop
Blog
Contact Us
FAQ's

Share your email to be the first to know about exclusive offers, behind the scenes footage, and new product alerts.

Email

Facebook
Instagram
YouTube
TikTok

Country/region

Country/region

© 2025, Circuit Demon Powered by Shopify

Refund policy
Privacy policy
Terms of service
Shipping policy
Contact information

Choosing a selection results in a full page refresh.
Opens in a new window.