KA24 unorthodox pulley set

[ChicagoS14]

The only issue with either the OBX or UR set is that aside from the lack of timing marks on the crank pulley, you will notice that after hard driving you will go through rear main seals like nobodies business. Mainly because they don't have harmonic dampers.The Fluidampr and ATI crank pulleys are the only aftermarket pulleys that actually work without detrimental effects to the engine.

[Matej]

Originally Posted by ChicagoS14

The only issue with either the OBX or UR set is that aside from the lack of timing marks on the crank pulley, you will notice that after hard driving you will go through rear main seals like nobodies business. Mainly because they don't have harmonic dampers.

The authentic UR crank pulley does have timing marks, and the stock crank pulley is not a harmonic balancer either.