July 29, 2003 Smithway Motor Xpress, Inc. 2031 Quail Avenue Fort Dodge, Iowa 50501 And East West Motor Express, Inc. 1170 JB Drive Black Hawk, South Dakota 57718 Re: Sixth Amendment to Amended and Restated Loan and Security Agreement Gentlemen: Smithway Motor Xpress, Inc., an Iowa corporation ("Smithway Inc.") and East West Motor Express, Inc., a South Dakota corporation ("East West") (Smithway Inc. and East West each a "Borrower" and collectively the "Borrowers") and LaSalle Bank National Association, a national banking association ("Bank") have entered into that certain Amended and Restated Loan and Security Agreement dated December 28, 2001 (the "Security Agreement"). From time to time thereafter, Borrowers and Bank may have executed various amendments (each an "Amendment" and collectively the "Amendments") to the Security Agreement (the Security Agreement and the Amendments hereinafter are referred to, collectively, as the "Agreement"). Borrowers and Bank now desire to further amend the Agreement as provided herein, subject to the terms and conditions hereinafter set forth. NOW, THEREFORE, in consideration of the foregoing recitals, the mutual covenants and agreements set forth herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: 1. The Agreement hereby is amended as follows: (a) The definition of "Maximum Loan Limit" set forth in Paragraph 1 of the Agreement is deleted in its entirety and the following is substituted in its place: "Maximum Loan Limit" shall mean Twenty-Seven Million Five Hundred Thousand and No/100 Dollars ($27,500,000.00). Smithway Motor Xpress, Inc. East West Motor Express, Inc. July 29, 2003 Page 2 (b) Subsection 2(a) of the Agreement is deleted in its entirety and the following is substituted in its place: 2. LOANS. (a) Revolving Loans. Subject to the terms and conditions of this Agreement and the Other Agreements, during the Original Term and any Renewal Term, Lender shall, absent the occurrence of an Event of Default, make revolving loans and advances to Borrowers' (the "Revolving Loans") in an amount up to the sum of the following sublimits (the "Revolving Loan Limit"): (i) Up to eighty-five percent (85%), or such lesser percentage as determined by Lender in its sole discretion determined in good faith, of the face amount (less maximum discounts, credits and allowances which may be taken by or granted to Account Debtors in connection therewith in the ordinary course of Borrowers' business) of Borrowers' Eligible Accounts (consisting solely of Eligible Accounts other than those set forth at subsection (ii) immediately below); plus (ii) Up to eighty-five percent (85%), or such lesser percentage as determined by Lender in its sole discretion determined in good faith, of the face amount (less maximum discounts, credits and allowances which may be taken by or granted to Account Debtors in connection therewith in the ordinary course of Borrowers' business) of Borrowers' Eligible Accounts (consisting solely of Accounts which are unbilled for three (3) days or less) or Two Million Five Hundred Thousand and No/100 Dollars ($2,500,000.00), whichever is less; plus (iii) Intentionally Omitted; minus (iv) such reserves as Lender elects, in its sole discretion determined in good faith to establish from time to time; provided, that the Revolving Loan Limit shall in no event exceed Twenty-Seven Million Five Hundred Thousand and No/100 Dollars ($27,500,000.00) less the then-outstanding principal balance of the Term Loans (the "Maximum Revolving Loan Limit") except as such amount may be increased or, following the Smithway Motor Xpress, Inc. East West Motor Express, Inc. July 29, 2003 Page 3 occurrence of an Event of Default, decreased by Lender, in its sole discretion. The aggregate unpaid principal balance of the Revolving Loans shall not at any time exceed the lesser of the (i) Revolving Loan Limit minus the Letter of Credit Obligations and (ii) the Maximum Revolving Loan Limit minus the Letter of Credit Obligations. If at any time the outstanding Revolving Loans exceeds either the Revolving Loan Limit or the Maximum Revolving Loan Limit, in each case minus the Letter of Credit Obligations, or any portion of the Revolving Loans and Letter of Credit Obligations exceeds any applicable sublimit within the Revolving Loan Limit, Borrowers shall immediately, and without the necessity of demand by Lender, pay to Lender such amount as may be necessary to eliminate such excess and Lender shall apply such payment to the Revolving Loans to eliminate such excess. Each Borrower hereby authorizes Lender, in its sole discretion, to charge any of such Borrower's accounts or advance Revolving Loans to make any payments of principal, interest, fees, costs or expenses required to be made under this Agreement or the Other Agreements. A request for a Revolving Loan shall be made or shall be deemed to be made, each in the following manner: the Borrower requesting such Revolving Loan shall give Lender same day notice, no later than 10:30 A.M. (Chicago time) for such day, of its request for a Revolving Loan as a Prime Rate Loan. In the event that a Borrower maintains a controlled disbursement account at Lender, each check presented for payment against such controlled disbursement account and any other charge or request for payment against such controlled disbursement account shall constitute a request for a Revolving Loan as a Prime Rate Loan. As an accommodation to Borrowers, Lender may permit telephone requests for Revolving Loans and electronic transmittal of instructions, authorizations, agreements or reports to Lender by Borrowers. Unless a Borrower specifically directs Lender in writing not to accept or act upon telephonic or electronic communications from such Borrower, Lender shall have no liability to Borrowers for any loss or damage suffered by a Borrower as a result of Lender's honoring of any requests, execution of any instructions, authorizations or agreements or reliance on any Smithway Motor Xpress, Inc. East West Motor Express, Inc. July 29, 2003 Page 4 reports communicated to it telephonically or electronically and purporting to have been sent to Lender by a Borrower and Lender shall have no duty to verify the origin of any such communication or the authority of the Person sending it. Each Borrower hereby irrevocably authorizes Lender to disburse the proceeds of each Revolving Loan requested by such Borrower, or deemed to be requested by such Borrower, as follows: the proceeds of each Revolving Loan requested under Section 2(a) shall be disbursed by Lender in lawful money of the United States of America in immediately available funds, by wire transfer or Automated Clearing House (ACH) transfer to such bank account as may be agreed upon by such Borrower and Lender from time to time, or elsewhere if pursuant to a written direction from such Borrower. (c) Subsection 4(b) of the Agreement is deleted in its entirety and the following is substituted in its place: (iv) One-Time Fee: Borrowers shall pay to Lender a one-time fee of Ten Thousand and No/100 Dollars ($10,000.00), which fee shall be fully earned and payable upon execution of this Amendment. (d) Section 10 of the Agreement is deleted in its entirety and the following is substituted in its place: 10. TERMINATION: AUTOMATIC RENEWAL. THIS AGREEMENT SHALL BE IN EFFECT UPON EXECUTION OF THIS AMENDMENT UNTIL JULY 1, 2004 (THE "ORIGINAL TERM") AND SHALL AUTOMATICALLY RENEW ITSELF FROM MONTH TO MONTH THEREAFTER (EACH SUCH ONE-MONTH RENEWAL BEING REFERRED TO HEREIN AS A "RENEWAL TERM") unless (A) THE DUE DATE OF THE LIABILITIES IS ACCELERATED PURSUANT TO SECTION 16 HEREOF; OR (B) A BORROWER OR LENDER ELECTS TO TERMINATE THIS AGREEMENT AT THE END OF THE ORIGINAL TERM OR AT THE END OF ANY RENEWAL TERM BY GIVING THE OTHER PARTY WRITTEN NOTICE OF SUCH ELECTION AT Smithway Motor Xpress, Inc. East West Motor Express, Inc. July 29, 2003 Page 5 LEAST FIFTEEN (15) DAYS PRIOR TO THE END OF THE ORIGINAL TERM OR THE THEN CURRENT RENEWAL TERM IN WHICH CASE BORROWERS SHALL PAY ALL OF THE LIABILITIES IN FULL ON THE LAST DAY OF SUCH TERM. If one or more of the events specified in clauses (a) and (b) occurs, then (i) Lender shall not make any additional Loans on or after the date identified as the date on which the Liabilities are to be repaid; and (ii) this Agreement shall terminate on the date thereafter that the Liabilities are paid in full. At such time as Borrowers have repaid all of the Liabilities and this Agreement has terminated, Borrowers shall deliver to Lender a release, in form and substance satisfactory to Lender, of all obligations and liabilities of Lender and its officers, directors, employees, agents, parents, subsidiaries and affiliates to such Borrowers, and if Borrowers are obtaining new financing from another lender, Borrowers shall deliver such lender's indemnification of Lender, in form and substance satisfactory to Lender, for checks which Lender has credited to such Borrower's account, but which subsequently are dishonored for any reason or for automatic clearinghouse or wire transfers not yet posted to such Borrower's account. (e) Exhibit A of the Agreement is amended and restated as the First Amended and Restated Exhibit A as attached hereto and made a part hereof. 2. This Amendment shall not become effective until fully executed by all parties hereto. 3. Except as expressly amended hereby and by any other supplemental documents or instruments executed by either party hereto in order to effectuate the transactions contemplated hereby, the Agreement and Exhibit A thereto hereby are ratified and confirmed by the parties hereto and remain in full force and effect in accordance with the terms thereof. Smithway Motor Xpress, Inc. East West Motor Express, Inc. July 29, 2003 Page 6 LASALLE BANK NATIONAL ASSOCIATION By /s/ John Mostofi --------------------------------- Title Sr VP ------------------------------ ACKNOWLEDGED AND AGREED TO this 31st day of July, 2003: SMITHWAY MOTOR XPRESS, INC. By /s/ William G. Smith ----------------------------------- William G. Smith Title President EAST WEST MOTOR EXPRESS, INC. By /s/ William G. Smith ----------------------------------- William G. Smith Title President Consented and agreed to by the following guarantor(s) of the obligations of Smithway Motor Xpress, Inc. and East West Motor Express, Inc. to LaSalle Bank National Association. SMSD Acquisition Corp. By: /s/ G. Larry Owens ----------------------------------- G. Larry Owens Title: Vice President Date: July 31st, 2003 Smithway Motor Xpress, Inc. East West Motor Express, Inc. July 29, 2003 Page 7 Smithway Motor Xpress Corp. By: /s/ G. Larry Owens ----------------------------------- G. Larry Owens Title: Vice President Date: July 31st, 2003 Exhibits available upon request.