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  <xsd:element abstract="true" id="hlly_statement-statement-note-18-commitments-and-contingencies-schedule-of-accrual-for-product-warranties-details" name="statement-statement-note-18-commitments-and-contingencies-schedule-of-accrual-for-product-warranties-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-18-commitments-and-contingencies-tables" name="statement-statement-note-18-commitments-and-contingencies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-2-acquisitions-allocation-of-the-purchase-price-to-the-estimated-fair-values-of-assets-acquired-and-liabilities-assumed-details" name="statement-statement-note-2-acquisitions-allocation-of-the-purchase-price-to-the-estimated-fair-values-of-assets-acquired-and-liabilities-assumed-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-2-acquisitions-tables" name="statement-statement-note-2-acquisitions-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-3-inventory-schedule-of-inventory-details" name="statement-statement-note-3-inventory-schedule-of-inventory-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-3-inventory-tables" name="statement-statement-note-3-inventory-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-4-property-plant-and-equipment-net-schedule-of-longlived-assets-by-geographic-locations-details" name="statement-statement-note-4-property-plant-and-equipment-net-schedule-of-longlived-assets-by-geographic-locations-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-4-property-plant-and-equipment-net-schedule-of-property-plant-and-equipment-details" name="statement-statement-note-4-property-plant-and-equipment-net-schedule-of-property-plant-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-4-property-plant-and-equipment-net-tables" name="statement-statement-note-4-property-plant-and-equipment-net-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-5-goodwill-and-other-intangible-assets-schedule-of-finitelived-intangible-assets-future-amortization-expense-details" name="statement-statement-note-5-goodwill-and-other-intangible-assets-schedule-of-finitelived-intangible-assets-future-amortization-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-5-goodwill-and-other-intangible-assets-schedule-of-goodwill-details" name="statement-statement-note-5-goodwill-and-other-intangible-assets-schedule-of-goodwill-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-5-goodwill-and-other-intangible-assets-summary-of-intangible-assets-details" name="statement-statement-note-5-goodwill-and-other-intangible-assets-summary-of-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-5-goodwill-and-other-intangible-assets-tables" name="statement-statement-note-5-goodwill-and-other-intangible-assets-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-6-accrued-liabilities-accrued-liabilities-details" name="statement-statement-note-6-accrued-liabilities-accrued-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-6-accrued-liabilities-tables" name="statement-statement-note-6-accrued-liabilities-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-7-debt-future-maturities-of-longterm-debt-and-amortization-of-debt-issuance-cost-details" name="statement-statement-note-7-debt-future-maturities-of-longterm-debt-and-amortization-of-debt-issuance-cost-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-7-debt-schedule-of-debt-details" name="statement-statement-note-7-debt-schedule-of-debt-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-note-7-debt-tables" name="statement-statement-note-7-debt-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hlly_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
