So im finished for the most part with the whole flat panel underbody project I just finished the front after some heat testing.
To recap with weight changes for the front
Original Skid plate converted to Coroplast saved -1.5lbs
Split the front into 2 panels with a combined weight of 1.75lbs
First heat run of 30 minute spirited drive the clips in the header area did not hold due to distortion of the coroplast. So I added some aluminum strips to use as mounting points
with some hardware im going to up estimate the weight to .75lbs
All done
Finished up front and total car. I may at some point consider a non aggressive splitter but it may not be necessary. Most look very heavy. Carbon fiber one from APR could be a winner and looks damn good
https://aprperformance.com/2017_gt-86_brz/
So lost 1.5 lbs on the coroplast skid plate, added in 2.5lbs with the new plates and aluminum mounting. So only a 1lb gain up front
Putting me back up to 2351.5 LBS
EDIT 5/12: Forgot to weight the fiberglass stock cover came in at 1lb. So This section of the aero up front didn't gain any Weight
