Well I'll be...
The Commodore sliding style caliper that I used is more bulky than the Willwoods! Just confirm you are using the larger of the two NSX rotors (97on - I'm sure you are).
That'll learn me for assuming things without measurement.
Still a damn sight better that the CD size discs on the Lancer originally.
Lucky you asked me to check. Im actually running a 282mm disc. DBA part No. 484. That'll teach me for trying to remember values off the top of my head.
You could run this Wilwood caliper with a 298mm disc but it won't fit a 15" rim. The reason I went to 282mm was so I could run 15's.
To clarify.. that mount drawing is for a 282mm disc. Adjust as necessary for a 298mm disc.