FOR IMMEDIATE RELEASE

PLEXUS Q4 EARNINGS RELEASE ON OCTOBER 31 ST AFTER MARKET CLOSE AND CONFERENCE CALL ON NOVEMBER 1 ST at 8:30 am E.T.

NEENAH, WI, September 27, 2007 -- Plexus Corp. (Nasdaq: PLXS), today announced it will release its fiscal 2007 fourth quarter and full year results for the period ended September 30, 2007 on Wednesday, October 31 st after the stock market closes. Senior management will host a live webcast and conference call to review the results on Thursday, November 1 st at 8:30 a.m. Eastern Time.

What: Plexus Corp.’s Fiscal Q4 Earnings Conference Call

When: Thursday, November 1 st at 8:30 a.m. Eastern Time

Where: 888-693-3477 or 973-582-2710 with conference ID: 9261576

http://www.videonewswire.com/PLXS/110107

(requires Windows Media Player)

Replay: The call will be archived until November 8, 2007 at noon Eastern Time

http://www.videonewswire.com/PLXS/110107

or via telephone replay at 877-519-4471 or 973-341-3080

PIN: 9261576

Contact: Dianne Boydstun, 920-751-5583, dianne.boydstun@plexus.com

** Please contact Dianne to switch from fax to email distribution **

About Plexus Corp. – The Product Realization Company

Plexus (www.plexus.com) is an award-winning participant in the Electronics Manufacturing Services (EMS) industry, providing product design, test, manufacturing and fulfillment and aftermarket solutions to branded product companies in the Wireline/Networking, Wireless Infrastructure, Medical, Industrial/Commercial and Defense/Security/Aerospace industries.

The Company’s unique Focused Factory manufacturing model and proprietary global supply chain solutions are strategically enhanced by value-added product design and engineering services. Plexus specializes in customer programs that require flexibility, scalability, technology and quality.

Plexus provides award-winning customer service to more than 100 branded product companies in North America, Europe and Asia.

For further information, please contact:

Kristian Talvitie, Vice President Marketing, Branding & Corporate Communications

920-969-6160

kristian.talvitie@plexus.com

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