EXHIBIT 99.5

# CERTIFICATION REQUIRED
BY RULE 13a-14(a) OR RULE 15d-14(a)

I, Edward G. Frackowiak, Chairman and
Chief Executive Officer of Wescast Industries Inc., certify that: 1. I have reviewed this
annual report on Form 40-F of Wescast Industries, Inc.;

|1. | I have reviewed this annual report on Form 40-F of Wescast Industries Inc.,
|-- | ---------------------------------------------------------------------------

|2. | Based on my knowledge, this report does not contain any untrue statement of a
          material fact or omit to state a material fact necessary to make the statements
          made, in light of the circumstances under which such statements were made, not
          misleading with respect to the period covered by this report;
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|3. | Based on my knowledge, the financial statements, and other financial information
          included in this report, fairly present in all material respects the financial
          condition, results of operations and cash flows of the issuer as of, and for,
          the periods presented in this report;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|4. | The issuers other certifying officer and I are responsible for
          establishing and maintaining disclosure controls and procedures (as defined in
          Exchange Act Rules 13a-15(e) and 15d-15(e)) for the issuer and have:
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|a. |  | Designed such disclosure controls and procedures, or caused such disclosure
               controls and procedures to be designed under our supervision, to ensure that
               material information relating to the issuer, including its consolidated
               subsidiaries, is made known to us by others within those entities, particularly
               during the period in which this report is being prepared;
|-- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|b. |  | Evaluated the effectiveness of the issuers disclosure controls and
               procedures and presented in this report our conclusions about the effectiveness
               of the disclosure controls and procedures, as of the end of the period covered
               by this report based on such evaluation; and
|-- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|c. |  | Disclosed in this report any change in the issuers internal control over
               financial reporting that occurred during the period covered by the annual report
               that has materially affected, or is reasonably likely to materially affect, the
               issuers internal control over financial reporting; and
|-- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|5. | The issuers other certifying officer and I have disclosed, based on our
          most recent evaluation of internal control over financial reporting, to the
          issuers auditors and the audit committee of the issuers board of
          directors (or persons performing the equivalent functions):
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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|a. |  | All significant deficiencies and material weaknesses in the design or operation
               of internal control over financial reporting which are reasonably likely to
               adversely affect the issuers ability to record, process, summarize and
               report financial information; and
|-- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|b. |  | Any fraud, whether or not material, that involves management or other employees
               who have a significant role in the issuers internal control over financial
               reporting.
|-- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Date: March 30, 2005

| |                                            
| | -------------------------------------------
| | /s/ Edward G. Frackowiak                   
| | Name: Edward G. Frackowiak                 
| | Title: Chairman and Chief Executive Officer

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# CERTIFICATION REQUIRED
BY RULE 13a-14(a) OR RULE 15d-14(a)

I, Gordon E. Currie, Vice President
and Chief Financial Officer of Wescast Industries Inc., certify that: 1. I have reviewed
this annual report on Form 40-F of Wescast Industries Inc.;

|1. | I have reviewed this annual report on Form 40-F of Wescast Industries Inc.,
|-- | ---------------------------------------------------------------------------

|2. | Based on my knowledge, this report does not contain any untrue statement of a
          material fact or omit to state a material fact necessary to make the statements
          made, in light of the circumstances under which such statements were made, not
          misleading with respect to the period covered by this report;
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|3. | Based on my knowledge, the financial statements, and other financial information
          included in this report, fairly present in all material respects the financial
          condition, results of operations and cash flows of the issuer as of, and for,
          the periods presented in this report;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|4. | The issuers other certifying officer and I are responsible for
          establishing and maintaining disclosure controls and procedures (as defined in
          Exchange Act Rules 13a-15(e) and 15d-15(e)) for the issuer and have:
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|a. |  | Designed such disclosure controls and procedures, or caused such disclosure
               controls and procedures to be designed under our supervision, to ensure that
               material information relating to the issuer, including its consolidated
               subsidiaries, is made known to us by others within those entities, particularly
               during the period in which this report is being prepared;
|-- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|b. |  | Evaluated the effectiveness of the issuers disclosure controls and
               procedures and presented in this report our conclusions about the effectiveness
               of the disclosure controls and procedures, as of the end of the period covered
               by this report based on such evaluation; and
|-- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|c. |  | Disclosed in this report any change in the issuers internal control over
               financial reporting that occurred during the period covered by the annual report
               that has materially affected, or is reasonably likely to materially affect, the
               issuers internal control over financial reporting; and
|-- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|5. | The issuers other certifying officer and I have disclosed, based on our
          most recent evaluation of internal control over financial reporting, to the
          issuers auditors and the audit committee of the issuers board of
          directors (or persons performing the equivalent functions):
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---



|a. |  | All significant deficiencies and material weaknesses in the design or operation
               of internal control over financial reporting which are reasonably likely to
               adversely affect the issuers ability to record, process, summarize and
               report financial information; and
|-- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|b. |  | Any fraud, whether or not material, that involves management or other employees
               who have a significant role in the issuers internal control over financial
               reporting.
|-- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Date: March 30, 2005

| |                                                  
| | -------------------------------------------------
| | /s/ Gordon E. Currie                             
| | Name: Gordon E. Currie                           
| | Title: Vice President and Chief Financial Officer