I prefer an aluminum seat.
NHRA Section 16 - General Regulations
Interior:6
6:2 Seats
".....seats must be bolted with four bolts and nuts and washers.........all seats must be properly braced, framed, supported and constructed of aluminum, fiberglass, carbon fiber, or double layer poly. Single layer poly must have steel tube framework....."
I have seen the inserts in poly seats pull out.
NHRA Section 16 - General Regulations
Interior:6
6:2 Seats
".....seats must be bolted with four bolts and nuts and washers.........all seats must be properly braced, framed, supported and constructed of aluminum, fiberglass, carbon fiber, or double layer poly. Single layer poly must have steel tube framework....."
I have seen the inserts in poly seats pull out.