IFJ reduces the friction between the outdrive and the dog-bone. It increases the efficiency of transmission and decreases friction greatly. Due to the reduced friction in IFJ the suspension is softer and smoother under braking and accelerating 

Two IFJ sets are needed for one car.

IFJ set includes:

ST113  - 1pcs

ST116  - 1pcs

ST37X  - 1pcs

B415    - 2pcs

PIN01  - 1pcs

SPR07  - 2pcs