About Us

Our parent company, Monarch Products, Inc. is a family‑owned specialty distributor focused on spark plugs, glow plugs, and ignition components for internal combustion engines across automotive, powersports, marine, industrial, commercial, lawn & garden, and recreational markets. Founded in 1969 in Southern California, Monarch evolved from a regional motorcycle accessory distributor into a leading ignition-focused supplier supported by decades-long direct relationships with NGK, Denso, Champion, and Bosch.

In 1997, Monarch expanded into a dedicated warehouse and shipping facility in Menifee, California and launched its first consumer website, establishing the foundation for the SparkPlugs.com family of retail sites. Today, operating from a larger distribution center in Murrieta, California, Monarch serves customers nationwide with one of the largest curated inventories of spark plugs, glow plugs, and hard-to-find ignition part numbers in the United States.

Monarch is recognized for comprehensive inventory coverage, technical expertise in ignition products, fast and accurate fulfillment, and knowledgeable customer support. Spark plug replacement is a highly accessible DIY repair, and Monarch’s retail sites are designed to provide clear navigation, trusted brands, and reliable guidance for both first-time buyers and professionals.

Though other brands have been added to the offerings, Monarch still maintains their long term relationship with Denso, being one of their oldest US distributors.

The SparkPlugs.com family of sites continues Monarch’s long-standing commitment to product expertise, inventory depth and exceptional customer service.