I have a 1991 Ford F-150 extended cab andI need to raise the back seat for some10in. subwoofers. Does anyone know a good way to raise it without the kit. If nothow much does the kit cost and where doI get it

Thanks

 

You could try making some spacers to put under the rail where the seat bolts to the floor. How much higher do you need to go?

 

There needs to be about 8 inches for it to fitunder the seat.

 

You would need to fabricate some brackets to lift it up that high.