Are the two different or can i just swap one out fot the other I have an 88 T2 and Im lookin to swap in a 90 radiator. SHould I just flush the normal one or is it worth it to swich? or is it even possible????

 

i know they both have different filler necks but im pretty sure you can use either

 

The mounts won't interchange-so you need to swap the brackets from the S4 to the S5. Aftermarket rads with the brackets permanently attached are tougher to swap. A little fab will be required.



then the main diff is the filler neck.