Skip to content

Home
Shop
Contact Us
FAQs

Country/region

Country/region

Facebook
Instagram
TikTok
YouTube

Home
Shop
Contact Us
FAQs

Search

Item added to your cart

View cart

Collection: 2018-2021 STI All Parts

Filter:

Product type

0 selected

Product type

Air Boxes (3 products)
Alternator Mount Kit (2 products)
Axle Back (3 products)
Badges/Emblems (2 products)
Battery Tiedowns (7 products)
Blow Off Valves (23 products)
Boost Controller Accessories (5 products)
Brackets (2 products)
Brake Calipers - OE (2 products)
Brake Hardware (2 products)
Brake Pads - OE (3 products)
Brake Pads - Performance (10 products)
Brake Pads - Racing (3 products)
Brake Rotors - Drilled (4 products)
Brake Rotors - OE (2 products)
Bushing Kits (25 products)
Camber Kits (2 products)
Catback (24 products)
Clutch Discs (4 products)
Clutch Kits - Multi (9 products)
Clutch Kits - Single (13 products)
Coilovers (7 products)
Cold Air Intakes (10 products)
Connecting Pipes (2 products)
Control Arms (7 products)
Coolant Reservoirs (4 products)
Diff Braces (2 products)
Differential Bushings (6 products)
Dipsticks (9 products)
DIY Retrofit kit (2 products)
Downpipes (2 products)
ECU Tunes (4 products)
Engine Bay Caps (4 products)
Engine Covers (6 products)
Engine Cylinder Head Gasket (2 products)
Engine Cylinder Head Set (18 products)
Engine Cylinder Head Stud (2 products)
Engine Long Block (10 products)
Engine Mount (5 products)
Engine Mounts (20 products)
Engine Oil Change Kit (2 products)
Engine Oil Pan (4 products)
Engine Oil Separator (3 products)
Engine Oil Separator Hose (2 products)
Engine Short Block (7 products)
Engine Timing Belt Component Kit (4 products)
Engine Timing Belt Kit with Water Pump (2 products)
Exhaust Adapters (6 products)
Exhaust Gaskets (3 products)
Exhaust Hangers (2 products)
Exhaust Header (2 products)
Extender (2 products)
Exterior Trim (7 products)
Flanges (3 products)
Flywheels (4 products)
Fuel Hose Kit (61 products)
Fuel Injection Fuel Rail (3 products)
Fuel Injector Sets - 4Cyl (7 products)
Fuel Pump Hangers (5 products)
Fuel Pumps (5 products)
Fuel Rails (5 products)
Hardware Kits - Other (4 products)
Headers & Manifolds (3 products)
Heat Shields (3 products)
Hoses (5 products)
Ignition Coils (3 products)
Intercooler Kits (7 products)
License Plate Relocation (5 products)
Lowering Springs (7 products)
Manual Transmission Mount (6 products)
Mud Flaps (18 products)
Oil Caps (10 products)
Oil Coolers (5 products)
Oil Filters (7 products)
Oil Separators (4 products)
Power Packages (10 products)
Pulleys - Crank, Underdrive (7 products)
Radiator Caps (6 products)
Radiator Shrouds (12 products)
Radiator Stays (8 products)
Radiators (3 products)
Shifter Bushings (6 products)
Shifters (3 products)
Shocks and Struts (4 products)
Spark Plugs (3 products)
Strut Bars (5 products)
Super Core Assemblies (5 products)
Suspension Arms & Components (6 products)
Sway Bar Bushings (3 products)
Sway Bar Endlinks (9 products)
Sway Bars (6 products)
Tow Hooks (9 products)
Transmission Mounts (3 products)
Turbine Housings (6 products)
Turbochargers (8 products)
Wastegates (9 products)
Wheel Spacers & Adapters (11 products)
Wheels (289 products)
Wheels - Cast (193 products)

Air Boxes (3 products)
Alternator Mount Kit (2 products)
Axle Back (3 products)
Badges/Emblems (2 products)
Battery Tiedowns (7 products)
Blow Off Valves (23 products)
Boost Controller Accessories (5 products)
Brackets (2 products)
Brake Calipers - OE (2 products)
Brake Hardware (2 products)
Brake Pads - OE (3 products)
Brake Pads - Performance (10 products)
Brake Pads - Racing (3 products)
Brake Rotors - Drilled (4 products)
Brake Rotors - OE (2 products)
Bushing Kits (25 products)
Camber Kits (2 products)
Catback (24 products)
Clutch Discs (4 products)
Clutch Kits - Multi (9 products)
Clutch Kits - Single (13 products)
Coilovers (7 products)
Cold Air Intakes (10 products)
Connecting Pipes (2 products)
Control Arms (7 products)
Coolant Reservoirs (4 products)
Diff Braces (2 products)
Differential Bushings (6 products)
Dipsticks (9 products)
DIY Retrofit kit (2 products)
Downpipes (2 products)
ECU Tunes (4 products)
Engine Bay Caps (4 products)
Engine Covers (6 products)
Engine Cylinder Head Gasket (2 products)
Engine Cylinder Head Set (18 products)
Engine Cylinder Head Stud (2 products)
Engine Long Block (10 products)
Engine Mount (5 products)
Engine Mounts (20 products)
Engine Oil Change Kit (2 products)
Engine Oil Pan (4 products)
Engine Oil Separator (3 products)
Engine Oil Separator Hose (2 products)
Engine Short Block (7 products)
Engine Timing Belt Component Kit (4 products)
Engine Timing Belt Kit with Water Pump (2 products)
Exhaust Adapters (6 products)
Exhaust Gaskets (3 products)
Exhaust Hangers (2 products)
Exhaust Header (2 products)
Extender (2 products)
Exterior Trim (7 products)
Flanges (3 products)
Flywheels (4 products)
Fuel Hose Kit (61 products)
Fuel Injection Fuel Rail (3 products)
Fuel Injector Sets - 4Cyl (7 products)
Fuel Pump Hangers (5 products)
Fuel Pumps (5 products)
Fuel Rails (5 products)
Hardware Kits - Other (4 products)
Headers & Manifolds (3 products)
Heat Shields (3 products)
Hoses (5 products)
Ignition Coils (3 products)
Intercooler Kits (7 products)
License Plate Relocation (5 products)
Lowering Springs (7 products)
Manual Transmission Mount (6 products)
Mud Flaps (18 products)
Oil Caps (10 products)
Oil Coolers (5 products)
Oil Filters (7 products)
Oil Separators (4 products)
Power Packages (10 products)
Pulleys - Crank, Underdrive (7 products)
Radiator Caps (6 products)
Radiator Shrouds (12 products)
Radiator Stays (8 products)
Radiators (3 products)
Shifter Bushings (6 products)
Shifters (3 products)
Shocks and Struts (4 products)
Spark Plugs (3 products)
Strut Bars (5 products)
Super Core Assemblies (5 products)
Suspension Arms & Components (6 products)
Sway Bar Bushings (3 products)
Sway Bar Endlinks (9 products)
Sway Bars (6 products)
Tow Hooks (9 products)
Transmission Mounts (3 products)
Turbine Housings (6 products)
Turbochargers (8 products)
Wastegates (9 products)
Wheel Spacers & Adapters (11 products)
Wheels (289 products)
Wheels - Cast (193 products)

Brand

0 selected

Brand

Color

0 selected

Color

Amber yellow (3 products)
Black (76 products)
Blue (41 products)
Bracket Only (1 product)
Bronze (61 products)
Cool White (1 product)
Gold (6 products)
Green (3 products)
Grey (1 product)
Gunmetal (31 products)
Pure white (3 products)
Red (7 products)
Silver (41 products)
White (56 products)

Amber yellow (3 products)
Black (76 products)
Blue (41 products)
Bracket Only (1 product)
Bronze (61 products)
Cool White (1 product)
Gold (6 products)
Green (3 products)
Grey (1 product)
Gunmetal (31 products)
Pure white (3 products)
Red (7 products)
Silver (41 products)
White (56 products)

Price

The highest price is $18,199.99

$

From

$

To

1206 products

Filter Filter

Filter

Filter

1206 products

Product type

Air Boxes (3 products)
Alternator Mount Kit (2 products)
Axle Back (3 products)
Badges/Emblems (2 products)
Battery Tiedowns (7 products)
Blow Off Valves (23 products)
Boost Controller Accessories (5 products)
Brackets (2 products)
Brake Calipers - OE (2 products)
Brake Hardware (2 products)
Brake Pads - OE (3 products)
Brake Pads - Performance (10 products)
Brake Pads - Racing (3 products)
Brake Rotors - Drilled (4 products)
Brake Rotors - OE (2 products)
Bushing Kits (25 products)
Camber Kits (2 products)
Catback (24 products)
Clutch Discs (4 products)
Clutch Kits - Multi (9 products)
Clutch Kits - Single (13 products)
Coilovers (7 products)
Cold Air Intakes (10 products)
Connecting Pipes (2 products)
Control Arms (7 products)
Coolant Reservoirs (4 products)
Diff Braces (2 products)
Differential Bushings (6 products)
Dipsticks (9 products)
DIY Retrofit kit (2 products)
Downpipes (2 products)
ECU Tunes (4 products)
Engine Bay Caps (4 products)
Engine Covers (6 products)
Engine Cylinder Head Gasket (2 products)
Engine Cylinder Head Set (18 products)
Engine Cylinder Head Stud (2 products)
Engine Long Block (10 products)
Engine Mount (5 products)
Engine Mounts (20 products)
Engine Oil Change Kit (2 products)
Engine Oil Pan (4 products)
Engine Oil Separator (3 products)
Engine Oil Separator Hose (2 products)
Engine Short Block (7 products)
Engine Timing Belt Component Kit (4 products)
Engine Timing Belt Kit with Water Pump (2 products)
Exhaust Adapters (6 products)
Exhaust Gaskets (3 products)
Exhaust Hangers (2 products)
Exhaust Header (2 products)
Extender (2 products)
Exterior Trim (7 products)
Flanges (3 products)
Flywheels (4 products)
Fuel Hose Kit (61 products)
Fuel Injection Fuel Rail (3 products)
Fuel Injector Sets - 4Cyl (7 products)
Fuel Pump Hangers (5 products)
Fuel Pumps (5 products)
Fuel Rails (5 products)
Hardware Kits - Other (4 products)
Headers & Manifolds (3 products)
Heat Shields (3 products)
Hoses (5 products)
Ignition Coils (3 products)
Intercooler Kits (7 products)
License Plate Relocation (5 products)
Lowering Springs (7 products)
Manual Transmission Mount (6 products)
Mud Flaps (18 products)
Oil Caps (10 products)
Oil Coolers (5 products)
Oil Filters (7 products)
Oil Separators (4 products)
Power Packages (10 products)
Pulleys - Crank, Underdrive (7 products)
Radiator Caps (6 products)
Radiator Shrouds (12 products)
Radiator Stays (8 products)
Radiators (3 products)
Shifter Bushings (6 products)
Shifters (3 products)
Shocks and Struts (4 products)
Spark Plugs (3 products)
Strut Bars (5 products)
Super Core Assemblies (5 products)
Suspension Arms & Components (6 products)
Sway Bar Bushings (3 products)
Sway Bar Endlinks (9 products)
Sway Bars (6 products)
Tow Hooks (9 products)
Transmission Mounts (3 products)
Turbine Housings (6 products)
Turbochargers (8 products)
Wastegates (9 products)
Wheel Spacers & Adapters (11 products)
Wheels (289 products)
Wheels - Cast (193 products)

Clear

Brand

Clear

Color

Amber yellow (3 products)
Black (76 products)
Blue (41 products)
Bracket Only (1 products)
Bronze (61 products)
Cool White (1 products)
Gold (6 products)
Green (3 products)
Grey (1 products)
Gunmetal (31 products)
Pure white (3 products)
Red (7 products)
Silver (41 products)
White (56 products)

Clear

Price

The highest price is $18,199.99

$

From

$

To

Clear

Remove all

1206 products

Forced Performance UHF™ FP BLUE 51S - Subaru EJ Motors

Forced Performance UHF™ FP BLUE 51S - Subaru EJ Motors

Regular price $1,499.00 USD

Regular price Sale price $1,499.00 USD
Unit price per
Forced Performance FP XR BLACK 82HTZ Turbocharger - Subaru EJ Motors

Forced Performance FP XR BLACK 82HTZ Turbocharger - Subaru EJ Motors

Regular price From $2,899.00 USD

Regular price Sale price From $2,899.00 USD
Unit price per
Forced Performance FP XR RED 79HTZ Turbocharger - Subaru EJ Motors

Forced Performance FP XR RED 79HTZ Turbocharger - Subaru EJ Motors

Regular price From $2,899.00 USD

Regular price Sale price From $2,899.00 USD
Unit price per
Forced Performance FP XR Ball Bearing Blue 73HTZ Turbocharger - Subaru EJ Motors

Forced Performance FP XR Ball Bearing Blue 73HTZ Turbocharger - Subaru EJ Motors

Regular price From $2,699.00 USD

Regular price Sale price From $2,699.00 USD
Unit price per
IAG 1150 Destroked 2.35L Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 1150 BHP

IAG 1150 Destroked 2.35L Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 1150 BHP

Regular price $10,199.99 USD

Regular price ~~$8,999.99 USD~~ Sale price $10,199.99 USD
Unit price per
IAG 950 EJ25 Destroked 2.35L Closed Deck Short Block For WRX, STI, LGT, FXT - 950BHP

IAG 950 EJ25 Destroked 2.35L Closed Deck Short Block For WRX, STI, LGT, FXT - 950BHP

Regular price $6,799.99 USD

Regular price Sale price $6,799.99 USD
Unit price per

1
…
49
50
51

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

© 2024, Circuit Demon Powered by Shopify

Refund policy
Privacy policy
Terms of service
Shipping policy

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