Collection: Subaru WRX/STI 15-21'
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MBRP Pro Series 3" Cat-Back Exhaust - Street Version | 2015-2021 Subaru WRX/STI (S4800)
Regular price From $847.05 USDRegular priceUnit price / per$1,297.05 USDSale price From $847.05 USDSale -
2004-2007 Subaru STI Short Shifter Kit by Go Fast Bits (4002)
Regular price $242.28 USDRegular priceUnit price / per$339.00 USDSale price $242.28 USDSale -
EBC Brakes Stage 6 Front Brake Upgrade | 15-17 Subaru WRX / 06-14 Tribeca (S6KF1130)
Regular price $447.54 USDRegular priceUnit price / per$456.00 USDSale price $447.54 USDSale -
ACT Clutch Alignment Tool | Multiple Subaru Fitments (AT90)
Regular price $4.00 USDRegular priceUnit price / per$5.00 USDSale price $4.00 USDSale -
Eibach Pro-Kit Performance Springs | 2015-2019 Subaru WRX (7727.140)
Regular price $395.00 USDRegular priceUnit price / per$438.89 USDSale price $395.00 USDSale -
Revel Medallion Ultra Ti Catback Exhaust | Subaru WRX/ STI (08-21) (T60188R)
Regular price $1,009.24 USDRegular priceUnit price / per$1,290.00 USDSale price $1,009.24 USDSale -
CSF Aluminum Racing Radiator | SUBARU Impreza STI 2008-2014
Regular price $662.94 USDRegular priceUnit price / per$805.00 USDSale price $662.94 USDSale -
Competition Clutch Street/Strip Series 2600 Clutch Kit | Multiple Fitments (15021-2600)
Regular price $506.47 USDRegular priceUnit price / per$615.00 USDSale price $506.47 USDSale -
SuperPro Alloy Front Lower Control Arm Assembly | 2008-2014 Subaru WRX/STI (ALOY0015K)
Regular price $583.32 USDRegular priceUnit price / per$749.99 USDSale price $583.32 USDSale -
XClutch Twin Sprung Organic Clutch Kit | Subaru WRX STI & Legacy GT (XKSU23531-2A)
Regular price $1,454.93 USDRegular priceUnit price / per$1,870.63 USDSale price $1,454.93 USDSale -
Torque Solution Upper Differential Mount Inserts | 2015-2021 Subaru WRX/STI (TS-SU-303)
Regular price $88.88 USDRegular priceUnit price / per$111.10 USDSale price $88.88 USDSale -
Torque Solution Hella Horn Bracket | 2015-2021 Subaru WRX/STI (TS-SU-330)
Regular price $31.11 USDRegular priceUnit price / per$38.88 USDSale price $31.11 USDSale -
HKS Legamax Premium Exhaust | Subaru WRX/STI (15-21) (31021-BF001)
Regular price $1,592.00 USDRegular priceUnit price / per$1,990.00 USDSale price $1,592.00 USDSale -
HKS Hi-Power Cat Back Exhaust | Subaru Impreza WRX STI Sedan 11-14 (31008-BF003)
Regular price $745.41 USDRegular priceUnit price / per$880.00 USDSale price $745.41 USDSale -
HKS Hi-Power SPEC-L2 Exhaust | Subaru WRX/STI VAB EJ20 (15-21) (31019-AF130)
Regular price $1,609.41 USDRegular priceUnit price / per$1,800.00 USDSale price $1,609.41 USDSale -

Torque Solution Engine/Trans/Pitch Mount Kit | Subaru WRX (02-14)/STI (04-21) (TS-SU-123PR.2-PL)
Regular price $639.99 USDRegular priceUnit price / per$799.99 USDSale price $639.99 USDSale -
Torque Solution HD Cam Bolt | Multiple Subaru Fitments (TS-SU-626-N-1)
Regular price From $11.54 USDRegular priceUnit price / per$14.43 USDSale price From $11.54 USDSale -
Mishimoto Oil Cooler Kit | 2015-2021 Subaru STI (MMOC-STI-15)
Regular price From $570.95 USDRegular priceUnit price / per$628.00 USDSale price From $570.95 USDSale -
Mishimoto Charge Pipe Kit Hot Side Red | 2015-2018 Subaru WRX (MMICP-WRX-15WRD)
Regular price $319.95 USDRegular priceUnit price / per$352.00 USDSale price $319.95 USDSale -
K&N Engineering Drop In Air Filter: Subaru Legacy GT (2005-2008) / WRX / STi (2008-2011)
Regular price $57.22 USDRegular priceUnit price / per$68.99 USDSale price $57.22 USDSale
Upgrade Your Subaru WRX/STI 2015-2021 with Performance Parts & Accessories
This collection is tailored specifically for Subaru WRX and STI models from 2015 to 2021, offering a range of aftermarket parts designed to enhance your car’s performance, handling, and style. Whether you want to sharpen your driving experience or customize your vehicle’s look, these components fit your WRX/STI with confidence.
Which performance upgrades make the biggest difference for WRX/STI handling?
Improving handling on your WRX/STI starts with suspension and brake upgrades that enhance control and responsiveness. Upgrading coilovers or sway bars can reduce body roll and improve cornering precision, while performance brake kits provide stronger, more consistent stopping power under aggressive driving conditions.
- Adjustable coilovers for customizable ride height and damping
- Upgraded sway bars to reduce chassis flex
- Big brake kits with larger rotors and multi-piston calipers
- High-performance brake pads for improved bite and fade resistance
How do engine and drivetrain parts boost your WRX/STI’s performance?
Aftermarket engine and drivetrain components can improve power delivery, reliability, and throttle response. Popular upgrades include enhanced intake and exhaust systems, upgraded clutches, and stronger mounts that reduce drivetrain movement. These parts work together to optimize your WRX/STI’s performance without compromising daily drivability.
What exterior and interior accessories help customize your WRX/STI?
Personalizing your Subaru WRX/STI goes beyond performance with a variety of styling and comfort upgrades. From aerodynamic aero kits and lighting enhancements to upgraded shift knobs and steering wheels, these accessories let you tailor your vehicle’s appearance and driving feel. Shop the Subaru WRX/STI 15-21 collection at WheelFlip to find parts that fit perfectly and elevate your build.












