I'm curious how those RD D5s are going go over in USACi. It's a 4kwatt amp that's rated at 2kwatts @ 1 & 500w @ 4ohm. Talk about under-rated.for 0-100 go with 2 RD HW D5. Each one does 3800 at one ohm and have a usaci rateing of 500 run them strapped at .5 and I think that you'll have the power your lookin for. Also the 40.1 is no joke however I went from one 40.1 to a D9 and gained .9db and had way less voltage drop when wired to .5
