[GenCorp Letterhead]

April 24, 2014

Securities and Exchange Commission

100 F Street N.E.

Washington, D.C.  20549

Re: GenCorp Inc.

Form 10-K for the Year Ended November 30, 2013

Filed February 7, 2014

Form 10-Q for the Period Ended February 28, 2014

Filed March 31, 2014

File No. 1-1520

Ladies and Gentlemen:

This will confirm my telephone conversation of April 24, 2014 with Mr. David Korvin, whereby it was agreed that GenCorp Inc. will respond to your letter dated April 7, 2014, including comments of the staff of the Securities and Exchange Commission relating to the above-referenced Exchange Act Reports of GenCorp Inc. providing the requested information on or before May 5, 2014.

Sincerely,

/s/ Christopher Cambria

Christopher Cambria

Vice-President, General Counsel

     and Secretary