Participants and Alternates,

In the Amended Official Rules of June 30, 2011 and a bulletin dated July 1, 2011 we announced that Flowmaster products were the official mufflers for the 2011 AMSOIL Engine Masters Challenge at the University of Northwestern Ohio. The specified muffler by Division was noted and this bulletin is provided below for reference. Participating Teams header collector and or pipe are to attach directly to these event provided mufflers with a BAND CLAMP which are then attached to 14 feet of 6-inch flex pipe that directs spent gas to the outside.

Measurements in regards to width of exhaust and general hook up lengths were provided in the COMPETITOR'S Guide. They are attached to this message for added clarification.

To insure that all participants and their systems are prepared for this direct connection, we are providing some photos for reference.

STREET Division-
* FLOWMASTER Super 40 Series Muffler- Part Number 953045
* 3-INCH ID (Inside Diameter) muffler. PARTICPANT's must fit inside or directly on top of EMC provided MUFFLER for BAND Clamp connection. See Photo below
* Connection is from 0 inch to a maximum of 39 INCHES from the flywheel
* Competitors can add a length of their own pipe (shown below) provided the total distance from flywheel is 39 INCHES

Example shows Participant's header and/or pipe to EMC provided BAND CLAMP and MUFFLER.

XTREME STREET Division-
* FLOWMASTER Outlaw Series Muffler- Part Number 15450S
* 5-INCH ID (Inside Diameter) connection to provided muffler. PARTICPANT's must fit inside or directly on top of EMC provided MUFFLER for BAND Clamp connection. See Photo below
* Connection is from 0 inch (directly at flywheel) to a maximum distance of 39 INCHES from the flywheel
* Competitors can add a length of their own pipe provided the total distance from flywheel is 39 INCHES.

Example shows Participant's header to EMC provided BAND CLAMP and MUFFLER.

We provide this information to each TEAM prior to the competition so that Team Leaders and Members are aware with of these measurements and connections. It is the participant's responsibility to be ready with a direct fit connection.

The very best in the coming competition to all Teams and their Members.

AMSOIL Engine Masters Challenge Staff

PREVIOUS MESSAGE SENT AS REFERENCE

July 1, 2011

AMSOIL Engine Masters Challenge Participants and Alternates-

We are pleased to announce today that FLOWMASTER Mufflers has joined the program and is our Official Muffler for the 2011 AMSOIL Engine Masters Challenge. This new official product status is in both STREET and XTREME STREET divisions. Official Rules have made updated as of June 30, 2011 and posted to www.enginemasters.com by division.

Unlike previous years, Participants will not be required to bring mufflers as their entries will run in the dyno cells on provided mufflers already attached to the exhaust system. Connection to each competitive entry will be made at the header collectors. Additional details will be provided in the August Participant's Package sent to all participants and posted to the web site.

Mufflers that will be in used in competition are:

STREET
Super 40 Series Muffler- Part Number 953045
http://www.flowmastermufflers.com/shop/index.php?main_page=product_info&cPath=0&products_id=3440&ab=953045&recordID=&vehicle=&orig=953045

XTREME STREET
Outlaw Series Muffler- Part Number 15450S
http://www.flowmastermufflers.com/shop/index.php?main_page=product_info&cPath=137_208_209&products_id=4173

For any questions in regards to this change, please send in writing to questions@enginemasters.com

We are extremely excited for this addition to the program that will be in place at the University of Northwestern Ohio and their fantastic facility, faculty, and amazing student help staff for the AMSOIL Engine Masters Challenge. We thank FLOWMASTER Mufflers for their joining our group of distinguished company product and event supporters.

Thank you again for your support,

AMSOIL Engine Masters Challenge