SPL Rear Traction Arms for 15-21 WRX/STi (RTR GK) Matrix Concepts 5mm *Discontinued* NIVN-1063

5mm *Discontinued* NIVN-1063

reduced mass and an aggressive exhaust sound

H Cover Ported (4

it will fit a 7-bolt block but there is a small unnecessary portion of casting on the front of the 7-bolt block that will need to be sanded down slightly

SPL Rear Traction Arms for 15-21 WRX/STi (RTR GK) Matrix Concepts 5mm *Discontinued* NIVN-1063SPL adjustable rear traction arms for 2015 2021 WRX STI increase stability and response by eliminating bushing deflection under hard acceleration and braking and help to reduce wheel hop on hard launches. Vehicle Fitment: 2015 2021 Subaru WRX 2015 2021 Subaru STi Installation Instructions: SPL PDF Install Quick Specs: Made in the USA Lightweight, Anodized, Billet 6061 T6 Aluminum Arm Electroless Nickel plated 4130 Chromoly Double Adjuster For Quick