are you talking about the LX low back bucket seats? Yes....those are very uncomfortable seats. The hole in the lumbar area is normal in those seats and the only thing i can think of is to buy a back support pillow or something that you can sit on for extra support. I've always hated those seats. Having soft seat covers (sheep skin) helps soften and fill that area, but i'd highly recommend getting better seats, like GT/5.0L LX seats.
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2005 Suzuki Hayabusa GSX1300-R
1980 Ford Thunderbird - 255 V8
ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain
hi-po Mack Truck hood emblem
1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc.
Sold 02/06/04 
1989 Mustang GT ET: 13.304@102.29 mph (5-24-03)
Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)
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