As this is an street pro series kit
Lateral arm made of unique high density steel
we have had a channel machined in to the small end bush to route oil to a piston oil squirter hole to cool the piston underside to assist in draw heat away form the piston crown to prevent detonation and reduce over all piston tempretures
2 Litre Stroker Kit Includes:
Genuine hologrammed
Hardrace - FRONT UPPER ARM BUSHING AUDI, A4, A5, A7, S4, S5, 07-PRESENT, 4G 10-PRESENT, 8T 07-PRESENT, B8 08-16, B8 09-16 302 As this is an streetHARDENED rubber bushing made with high strength and anti crack rubber material, solid steering response and driving suspension feel, resist side inclined while cornering at high speed maneuvers . Reduces vibration . Provides stability . Increase steering response . OEM direct replacement . Regular greasing not required . No noise or squeaks