I've seen quite a lot of extensions that do Year/Make/Model search of products. That's not what i am after.
What i want is to let the customer select his vehicle type and once he did, i want all the products shown to only fit that vehicle in any category he navigates to. So say we have 2 categories - suspension and brakes; once the vehicle type is chosen, only parts fitting that vehicle will be shown under suspension and under brakes.
I also want to be able to define universal products which will be shown regardless of vehicle type chosen.