Aluminum or Teflon engine mounts for the S14. A good upgrade for any sporty BMW. It prevents the engine block from moving on the engine mounts, making steering actions feel a lot more direct and the fan does not hit the radiator during braking. Perhaps the best price/effect upgrade available.
Rubber is less resistant to oil and softens over time. These bushings last a lifetime.
Teflon/Delrin is available in different sizes, 80mm is standard. Set contains 2 engine mounts, good for 1 car.