The OEM Acura TL-S/CL-S Front strut bar is much better than using the Neuspeed bar with the original firewall<->strut bars.

The Comptech Titanium/Aluminum Strut bar maybe better, but for $300, you can get Comptech or Eibach Sway bars, which make a bigger difference than any strut bar could make.

BTW, strut bars are not different between I4s, and V6s.