The 2002 Acura NSX has a V6 engine.
The 2004 Acura NSX has 24 valves.
The 2002 Acura NSX has 24 valves.
The 2001 Acura NSX has 24 valves.
The 2001 Acura NSX has a V6 engine.
The 2003 Acura NSX has 24 valves.
The 2005 Acura NSX has 24 valves.
The 2003 Acura NSX has a V6 engine.
The 2004 Acura NSX has a V6 engine.
The 2005 Acura NSX has a V6 engine.
You need to specify what 1990 Acura are you swapping an NSX motor into.
The 2001 Acura NSX is a gas-powered vehicle.