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: 2011-2014 STI

Sort by:

1149 products

Filter:

Product type (0)

Product type

Air Boxes (2 products)
Air Filters - Drop In (1 product)
Air Intake + Accessories (12 products)
Alternator Mount Kit (2 products)
Antennas + Accessories (1 product)
Axle Back (1 product)
Battery Tiedowns (5 products)
Belts - Timing, Accessory (2 products)
Big Brake Kits (1 product)
Boost Controllers + Accessories (3 products)
BOV and BPV (19 products)
Brackets (2 products)
Brake Calipers + Rebuild (6 products)
Brake Hardware (2 products)
Brake Line Kits (5 products)
Brake Pads (47 products)
Brake Rotors (57 products)
Bushing Kits (22 products)
Camber Kits (2 products)
Camshafts (2 products)
Cat Back Exhaust (17 products)
Chassis Bracing (5 products)
Clutch Discs (4 products)
Clutch Kits - Multi (6 products)
Clutch Kits - Single (15 products)
Coilovers + Accessories (1 product)
Control Arms (3 products)
Coolant Reservoirs (2 products)
Cylinder Head + Sets (9 products)
Cylinder Head Gaskets (2 products)
Cylinder Head Studs + Bolts (3 products)
Diff Mounts + Braces + Bushings (4 products)
Dipsticks (5 products)
ECU Tunes (2 products)
Engine Covers (6 products)
Engine Gaskets + Sets (1 product)
Engine Long Block (5 products)
Engine Mounts (24 products)
Engine Oil Change Kit (2 products)
Engine Short Block (7 products)
Exhaust Adapters (3 products)
Exhaust Hangers (2 products)
Exhaust Manifolds + Accessories (5 products)
Fans & Shrouds (2 products)
Flanges (3 products)
Flex Fuel Kit (2 products)
Floor Mats (1 product)
Flywheels (3 products)
Fuel Injectors + Accessories (5 products)
Fuel Lines (91 products)
Fuel Pressure Regulators + Accessories (5 products)
Fuel Pumps + Hangers (6 products)
Fuel Rails (9 products)
Hardware (4 products)
Heat Shields (2 products)
HID (2 products)
Hoses (4 products)
Intercoolers + Accessories (18 products)
LED (3 products)
Lowering Springs (2 products)
Manual Transmission Mount (6 products)
Manual Transmission Synchro Assembly (2 products)
Mud Flaps (6 products)
Oil Caps (5 products)
Oil Catch Can (2 products)
Oil Pan + Baffles + Gaskets (6 products)
Oil Separators (5 products)
Oil Strainers + Gaskets (1 product)
Piston Rings (3 products)
Power Packages (10 products)
Pressure Plates (2 products)
Programmers + Accessories (1 product)
Pulleys - Crank, Underdrive (6 products)
Radiator Caps (4 products)
Radiator Hoses (2 products)
Radiator Shrouds (3 products)
Radiators (3 products)
Shifter Bushings (9 products)
Shifters (4 products)
Shock Mounts & Camber Plates (4 products)
Spark Plugs (2 products)
Strut Bars (5 products)
Suspension Arms & Components (4 products)
Suspension Controllers (2 products)
Sway Bar Endlinks (9 products)
Sway Bars (12 products)
Tail Lights (4 products)
Timing Belts + Components (7 products)
Tow Hooks (2 products)
Transmission Mounts (5 products)
Turbine Housings (4 products)
Turbo Inlets (2 products)
Turbo Kits (2 products)
Turbo Oil Lines + Accessories (1 product)
Turbochargers (7 products)
Wastegate + Accessories (4 products)
Water Meth (1 product)
Wheel Spacers & Adapters (8 products)
Wheels (289 products)
Wheels - Cast (177 products)

Air Boxes (2 products)
Air Filters - Drop In (1 product)
Air Intake + Accessories (12 products)
Alternator Mount Kit (2 products)
Antennas + Accessories (1 product)
Axle Back (1 product)
Battery Tiedowns (5 products)
Belts - Timing, Accessory (2 products)
Big Brake Kits (1 product)
Boost Controllers + Accessories (3 products)
BOV and BPV (19 products)
Brackets (2 products)
Brake Calipers + Rebuild (6 products)
Brake Hardware (2 products)
Brake Line Kits (5 products)
Brake Pads (47 products)
Brake Rotors (57 products)
Bushing Kits (22 products)
Camber Kits (2 products)
Camshafts (2 products)
Cat Back Exhaust (17 products)
Chassis Bracing (5 products)
Clutch Discs (4 products)
Clutch Kits - Multi (6 products)
Clutch Kits - Single (15 products)
Coilovers + Accessories (1 product)
Control Arms (3 products)
Coolant Reservoirs (2 products)
Cylinder Head + Sets (9 products)
Cylinder Head Gaskets (2 products)
Cylinder Head Studs + Bolts (3 products)
Diff Mounts + Braces + Bushings (4 products)
Dipsticks (5 products)
ECU Tunes (2 products)
Engine Covers (6 products)
Engine Gaskets + Sets (1 product)
Engine Long Block (5 products)
Engine Mounts (24 products)
Engine Oil Change Kit (2 products)
Engine Short Block (7 products)
Exhaust Adapters (3 products)
Exhaust Hangers (2 products)
Exhaust Manifolds + Accessories (5 products)
Fans & Shrouds (2 products)
Flanges (3 products)
Flex Fuel Kit (2 products)
Floor Mats (1 product)
Flywheels (3 products)
Fuel Injectors + Accessories (5 products)
Fuel Lines (91 products)
Fuel Pressure Regulators + Accessories (5 products)
Fuel Pumps + Hangers (6 products)
Fuel Rails (9 products)
Hardware (4 products)
Heat Shields (2 products)
HID (2 products)
Hoses (4 products)
Intercoolers + Accessories (18 products)
LED (3 products)
Lowering Springs (2 products)
Manual Transmission Mount (6 products)
Manual Transmission Synchro Assembly (2 products)
Mud Flaps (6 products)
Oil Caps (5 products)
Oil Catch Can (2 products)
Oil Pan + Baffles + Gaskets (6 products)
Oil Separators (5 products)
Oil Strainers + Gaskets (1 product)
Piston Rings (3 products)
Power Packages (10 products)
Pressure Plates (2 products)
Programmers + Accessories (1 product)
Pulleys - Crank, Underdrive (6 products)
Radiator Caps (4 products)
Radiator Hoses (2 products)
Radiator Shrouds (3 products)
Radiators (3 products)
Shifter Bushings (9 products)
Shifters (4 products)
Shock Mounts & Camber Plates (4 products)
Spark Plugs (2 products)
Strut Bars (5 products)
Suspension Arms & Components (4 products)
Suspension Controllers (2 products)
Sway Bar Endlinks (9 products)
Sway Bars (12 products)
Tail Lights (4 products)
Timing Belts + Components (7 products)
Tow Hooks (2 products)
Transmission Mounts (5 products)
Turbine Housings (4 products)
Turbo Inlets (2 products)
Turbo Kits (2 products)
Turbo Oil Lines + Accessories (1 product)
Turbochargers (7 products)
Wastegate + Accessories (4 products)
Water Meth (1 product)
Wheel Spacers & Adapters (8 products)
Wheels (289 products)
Wheels - Cast (177 products)

Brand (0)

Brand

Color (0)

Color

Black (75 products)
Blue (33 products)
Bronze (57 products)
Cool White (1 product)
Gold (6 products)
Green (3 products)
Grey (1 product)
Gunmetal (31 products)
Red (7 products)
Silver (41 products)
White (56 products)

Black (75 products)
Blue (33 products)
Bronze (57 products)
Cool White (1 product)
Gold (6 products)
Green (3 products)
Grey (1 product)
Gunmetal (31 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 (1037 products)
Out of stock (112 products)

In stock (1037 products)
Out of stock (112 products)

Sort by:

Filter and sort Filter

Filter and sort

Filter

1149 products

Product type

Air Boxes (2 products)
Air Filters - Drop In (1 products)
Air Intake + Accessories (12 products)
Alternator Mount Kit (2 products)
Antennas + Accessories (1 products)
Axle Back (1 products)
Battery Tiedowns (5 products)
Belts - Timing, Accessory (2 products)
Big Brake Kits (1 products)
Boost Controllers + Accessories (3 products)
BOV and BPV (19 products)
Brackets (2 products)
Brake Calipers + Rebuild (6 products)
Brake Hardware (2 products)
Brake Line Kits (5 products)
Brake Pads (47 products)
Brake Rotors (57 products)
Bushing Kits (22 products)
Camber Kits (2 products)
Camshafts (2 products)
Cat Back Exhaust (17 products)
Chassis Bracing (5 products)
Clutch Discs (4 products)
Clutch Kits - Multi (6 products)
Clutch Kits - Single (15 products)
Coilovers + Accessories (1 products)
Control Arms (3 products)
Coolant Reservoirs (2 products)
Cylinder Head + Sets (9 products)
Cylinder Head Gaskets (2 products)
Cylinder Head Studs + Bolts (3 products)
Diff Mounts + Braces + Bushings (4 products)
Dipsticks (5 products)
ECU Tunes (2 products)
Engine Covers (6 products)
Engine Gaskets + Sets (1 products)
Engine Long Block (5 products)
Engine Mounts (24 products)
Engine Oil Change Kit (2 products)
Engine Short Block (7 products)
Exhaust Adapters (3 products)
Exhaust Hangers (2 products)
Exhaust Manifolds + Accessories (5 products)
Fans & Shrouds (2 products)
Flanges (3 products)
Flex Fuel Kit (2 products)
Floor Mats (1 products)
Flywheels (3 products)
Fuel Injectors + Accessories (5 products)
Fuel Lines (91 products)
Fuel Pressure Regulators + Accessories (5 products)
Fuel Pumps + Hangers (6 products)
Fuel Rails (9 products)
Hardware (4 products)
Heat Shields (2 products)
HID (2 products)
Hoses (4 products)
Intercoolers + Accessories (18 products)
LED (3 products)
Lowering Springs (2 products)
Manual Transmission Mount (6 products)
Manual Transmission Synchro Assembly (2 products)
Mud Flaps (6 products)
Oil Caps (5 products)
Oil Catch Can (2 products)
Oil Pan + Baffles + Gaskets (6 products)
Oil Separators (5 products)
Oil Strainers + Gaskets (1 products)
Piston Rings (3 products)
Power Packages (10 products)
Pressure Plates (2 products)
Programmers + Accessories (1 products)
Pulleys - Crank, Underdrive (6 products)
Radiator Caps (4 products)
Radiator Hoses (2 products)
Radiator Shrouds (3 products)
Radiators (3 products)
Shifter Bushings (9 products)
Shifters (4 products)
Shock Mounts & Camber Plates (4 products)
Spark Plugs (2 products)
Strut Bars (5 products)
Suspension Arms & Components (4 products)
Suspension Controllers (2 products)
Sway Bar Endlinks (9 products)
Sway Bars (12 products)
Tail Lights (4 products)
Timing Belts + Components (7 products)
Tow Hooks (2 products)
Transmission Mounts (5 products)
Turbine Housings (4 products)
Turbo Inlets (2 products)
Turbo Kits (2 products)
Turbo Oil Lines + Accessories (1 products)
Turbochargers (7 products)
Wastegate + Accessories (4 products)
Water Meth (1 products)
Wheel Spacers & Adapters (8 products)
Wheels (289 products)
Wheels - Cast (177 products)

Clear

Brand

Clear

Color

Black (75 products)
Blue (33 products)
Bronze (57 products)
Cool White (1 products)
Gold (6 products)
Green (3 products)
Grey (1 products)
Gunmetal (31 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 (1037 products)
Out of stock (112 products)

Clear

Sort by:

Remove all

1149 products

IAG 750 CNC Pocket Ported W25 Competition Cylinder Heads Package W/ GSC S1 Cam & Lifters For 08-18 STI

IAG 750 CNC Pocket Ported W25 Competition Cylinder Heads Package W/ GSC S1 Cam & Lifters For 08-18 STI

Regular price $5,999.99 USD

Regular price ~~$5,699.99 USD~~ Sale price $5,999.99 USD
Unit price per
IAG 950 CNC Ported Race W25 Cylinder Heads Package (No Cams & Lifters) For 08-18 STI

IAG 950 CNC Ported Race W25 Cylinder Heads Package (No Cams & Lifters) For 08-18 STI

Regular price $4,899.99 USD

Regular price ~~$4,599.99 USD~~ Sale price $4,899.99 USD
Unit price per
IAG 950 CNC Ported Race W25 Cylinder Heads Package W/ GSC S2 Cam & Lifters For 08-18 STI

IAG 950 CNC Ported Race W25 Cylinder Heads Package W/ GSC S2 Cam & Lifters For 08-18 STI

Regular price $6,599.99 USD

Regular price ~~$6,299.99 USD~~ Sale price $6,599.99 USD
Unit price per
IAG 1150 Closed Deck Long Block Engine W/ IAG 1150 Heads / GSC S2 Camshafts For 08-18 STI

IAG 1150 Closed Deck Long Block Engine W/ IAG 1150 Heads / GSC S2 Camshafts For 08-18 STI

Regular price $18,199.99 USD

Regular price ~~$17,499.99 USD~~ Sale price $18,199.99 USD
Unit price per
IAG 1150 Closed Deck Long Block Engine W/ IAG 1150 Heads / GSC S3 Camshafts For 08-18 STI (REQUIRES Standalone Engine Management May Not Be Compatible With AVCS)

IAG 1150 Closed Deck Long Block Engine W/ IAG 1150 Heads / GSC S3 Camshafts For 08-18 STI (REQUIRES Standalone Engine Management May Not Be Compatible With AVCS)

Regular price $18,199.99 USD

Regular price ~~$17,499.99 USD~~ Sale price $18,199.99 USD
Unit price per
IAG 550 Long Block Engine W/ IAG 550 Heads For 2008-18 STI

IAG 550 Long Block Engine W/ IAG 550 Heads For 2008-18 STI

Regular price $9,799.99 USD

Regular price ~~$9,499.99 USD~~ Sale price $9,799.99 USD
Unit price per
IAG 750 Closed Deck Long Block Engine W/ IAG 750 Heads For 2008-18 STI

IAG 750 Closed Deck Long Block Engine W/ IAG 750 Heads For 2008-18 STI

Regular price $12,499.99 USD

Regular price ~~$11,799.99 USD~~ Sale price $12,499.99 USD
Unit price per
IAG 950 Closed Deck Long Block Engine W/ IAG 950 Heads For 2008-18 STI

IAG 950 Closed Deck Long Block Engine W/ IAG 950 Heads For 2008-18 STI

Regular price $13,699.99 USD

Regular price ~~$12,999.99 USD~~ Sale price $13,699.99 USD
Unit price per
IAG 1150 2.5L Subaru Closed Deck Short Block For WRX STI LGT FXT - 1150 BHP

IAG 1150 2.5L Subaru Closed Deck Short Block For WRX STI LGT FXT - 1150 BHP

Regular price $9,299.99 USD

Regular price ~~$8,999.99 USD~~ Sale price $9,299.99 USD
Unit price per
IAG 550 EJ25 Subaru Short Block For WRX STI Legacy GT Forester XT - 550 BHP

IAG 550 EJ25 Subaru Short Block For WRX STI Legacy GT Forester XT - 550 BHP

Regular price $3,999.99 USD

Regular price ~~$3,999.99 USD~~ Sale price $3,999.99 USD
Unit price per
IAG 950 EJ25 Subaru Closed Deck Short Block For WRX STI LGT FXT - 950 BHP

IAG 950 EJ25 Subaru Closed Deck Short Block For WRX STI LGT FXT - 950 BHP

Regular price $6,299.99 USD

Regular price ~~$5,999.99 USD~~ Sale price $6,299.99 USD
Unit price per
IAG Performance Unequal Length 3-Bolt Header & Uppipe For 02-14 WRX 04-21 STI 05-09 LGT 04-08 FXT.

IAG Performance Unequal Length 3-Bolt Header & Uppipe For 02-14 WRX 04-21 STI 05-09 LGT 04-08 FXT.

Regular price $749.99 USD

Regular price ~~$749.99 USD~~ Sale price $749.99 USD
Unit price per
IAG Performance Equal Length 3-Bolt Header & Uppipe For 02-14 WRX 04-21 STI 05-09 LGT 04-08 FXT.

IAG Performance Equal Length 3-Bolt Header & Uppipe For 02-14 WRX 04-21 STI 05-09 LGT 04-08 FXT.

Regular price $799.99 USD

Regular price ~~$799.99 USD~~ Sale price $799.99 USD
Unit price per
IAG 105K Service Package W/ AISIN Water Pump Fits 2008-14 Subaru WRX

IAG 105K Service Package W/ AISIN Water Pump Fits 2008-14 Subaru WRX

Regular price $749.99 USD

Regular price ~~$749.99 USD~~ Sale price $749.99 USD
Unit price per
IAG 105K Service Package W/ AISIN Water Pump Fits 2008-21 Subaru STI

IAG 105K Service Package W/ AISIN Water Pump Fits 2008-21 Subaru STI

Regular price $749.99 USD

Regular price ~~$749.99 USD~~ Sale price $749.99 USD
Unit price per
IAG V2 AOS Competition Series Replacement Install Kit For 08-14 WRX 08-18 STI.

IAG V2 AOS Competition Series Replacement Install Kit For 08-14 WRX 08-18 STI.

Regular price $219.99 USD

Regular price ~~$219.99 USD~~ Sale price $219.99 USD
Unit price per
Motul 5W30 X-CLEAN+ Oil Change Kit Subaru EJ WRX/STI

Sale

Motul 5W30 X-CLEAN+ Oil Change Kit Subaru EJ WRX/STI

Regular price $74.00 USD

Regular price ~~$82.00 USD~~ Sale price $74.00 USD
Unit price per

Sale
Work T7R 19x9.5 +25 GT Silver 5X114.3

Work T7R 19x9.5 +25 GT Silver 5X114.3

Regular price $580.00 USD

Regular price Sale price $580.00 USD
Unit price per
Work T7R 19x9.5 +12 GT Silver 5X114.3

Available To Order

Work T7R 19x9.5 +12 GT Silver 5X114.3

Regular price $580.00 USD

Regular price Sale price $580.00 USD
Unit price per

Available To Order
Work T7R 19x9.5 +12 White 5X114.3

Available To Order

Work T7R 19x9.5 +12 White 5X114.3

Regular price $550.00 USD

Regular price Sale price $550.00 USD
Unit price per

Available To Order
Work T7R 19x9.5 +12 Matte Gunmetal 5X114.3

Work T7R 19x9.5 +12 Matte Gunmetal 5X114.3

Regular price $550.00 USD

Regular price Sale price $550.00 USD
Unit price per
Work T7R 19x9.5 +12 Matte Bronze 5X114.3

Work T7R 19x9.5 +12 Matte Bronze 5X114.3

Regular price $550.00 USD

Regular price Sale price $550.00 USD
Unit price per
Work CR Kiwami 19x9.5 +15 White 5X114.3

Work CR Kiwami 19x9.5 +15 White 5X114.3

Regular price $570.00 USD

Regular price Sale price $570.00 USD
Unit price per
Work CR Kiwami 19x9.5 +15 Matte Bronze 5X114.3

Work CR Kiwami 19x9.5 +15 Matte Bronze 5X114.3

Regular price $570.00 USD

Regular price Sale price $570.00 USD
Unit price per

1
…
27
28
29
30
31
…
48

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.

Search