Cover Page - shares	9 Months Ended
	Sep. 26, 2021	Nov. 09, 2021
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 26, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Registrant Name	HOLLEY INC.
Entity Central Index Key	0001822928
Entity Incorporation, State or Country Code	DE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	false
Entity Tax Identification Number	87-1727560
Entity File Number	001-39599
Entity Address, Address Line One	1801 Russellville Road
Entity Address, City or Town	Bowling Green
Entity Address, State or Province	KY
Entity Address, Postal Zip Code	42101
City Area Code	270
Local Phone Number	495-4081
Entity Common Stock, Shares Outstanding		115,805,639
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.0001
Trading Symbol	HLLY
Security Exchange Name	NYSE
Warrant
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock
Trading Symbol	HLLY WS
Security Exchange Name	NYSE