1 EXHIBIT 15.1 November 11, 1997 Penske Motorsports, Inc. 13400 Outer Drive, West Detroit, Michigan 48239 We have made a review, in accordance with standards established by the American Institute of Certified Public Accountants, of the unaudited interim financial information of Penske Motorsports, Inc. for the periods ended September 30, 1997 and 1996, as indicated in our report dated October 30, 1997; because we did not perform an audit, we expressed no opinion on that information. We are aware that our report referred to above, which is included in your Quarterly Report on Form 10-Q for the quarter ended September 30, 1997, is incorporated by reference in Registration Statement No. 333-692 on Form S-8. We also are aware that the aforementioned report, pursuant to Rule 436(c) under the Securities Act of 1933, is not considered a part of the Registration Statement prepared or certified by an accountant or a report prepared or certified by an accountant within the meaning of Sections 7 and 11 of that Act. /s/ Deloitte & Touche LLP Detroit, Michigan