I'm looking to somewhat increase legitimate downforce on my 2017 GT350. Are there any gurney flaps available that can be added to the existing spoiler that will do this? I was going to pair this with a GT350R front splitter. I am considering this route as a simpler diy and budget minded solution. Otherwise, I was gonna go all in and speak with Kohr Motorsports about bolting the FP350S or GT4 front bumper and rear trunk lid (with associated aero bits) onto the GT350.