NRG Innovations NRG-FRP-310E Fiberglass Fixed Back Racing Seat - Medium Size (20"W x 18.5"D x 36"H) - Black Cover - 4 Point Harness Compatible - Perfect for Track Racing, Drifting & Performance Driving

I originally bought the FRP-300 and found it a bit short in the torso and narrow in the shoulders so I bought two other seats in the NRG range that were listed taller and wider in the shoulders, the FRP-311 and the FRP-302. I found the NRG size chart isn't that accurate, or at the least, the dimensions they give don't reflect the dimensions inside the bucket. Below is what I measured vs what NRG lists (google their chart, amazon won't allow links)FRP-300: AccurateShoulder Width (column A in the NRG chart): 23" vs 23" measuredSeatback Height (column F): 34" vs 34" measuredSeatback Height in bucket: 32"Outer width at rear mounting bolts: 17" measuredSeatback Angle (no NRG column): 102 degreeFRP-302: Narrower than listed, slightly bigger than the FRP-300Shoulder Width (column A in the NRG chart): 24" vs 23.5" measuredSeatback Height (column F): 36" vs 34.5" measuredSeatback Height in bucket: 32.5"Outer width at rear mounting bolts: 17" measured (per NRG chart column D, implied it should have been wider than FRP-300)Seatback Angle (no NRG column): 102 degreeFRP-311: Closer to accurate fit didn't work for meShoulder Width (column A in the NRG chart): 24.5" vs 24.25" measuredSeatback Height (column F): 36" vs 36" measuredOuter width at rear mounting bolts: 16.5" measured (per NRG chart column D, implied it should have been same as FRP-300)Seatback Angle (no NRG column): 97 degreeSeat bracket and seatback angle note: Even with a lower rear and higher front position compared to the 300 or 302, the 311 is much more upright. Using the standard NRG supplied bracket, I measure that it 10 degrees more upright at highest front position lowest rear compared to the 300 and 302 at highest front and middle rear. You would need an aftermarket seat bracket to match the seat angle of the other two.Of the 3, I kept the Prisma FRP-302. While it wasn't much bigger than the FRP-300, the build quality felt better and I liked the looks better. The FRP-311 while taller and wider at the shoulders, was too upright for me, and had a very large front leg cushion that cut into my legs that i didn't like. The FRP-300 is slightly smaller than the FRP-302, but the fabric construction isn't as nice as the FRP-302.As far as value and availability, NRG is hard to beat and value is strong for whichever you pick. I felt the premium for the Prisma FRP-302 was worth it for the colourways and nicer fabrics.