[Mark Markow]

the jaz aluminum seat is 11 lbs. with a cover. i can't give you an exact weight difference between the 2. but i will tell you that i will not mount a poly seat in any car i build. the inserts pull out of the bottoms and it's always a pain to mount the back of the seat. you also have to make an access hole, so you don,t crush the seat when you mount the back to the cage. just go with aluminum, leave the poly seats for those 60's style dune buggies.