Since its establishment in 1973, HKS has been at the forefront of automotive performance, specializing in high-quality engine components and turbo kits that outshine standard OEM products. The HKS Super Fire Racing M40LF spark plug is designed for those who demand the best from their vehicles, making it an ideal choice for enthusiasts looking to enhance their driving experience.
This spark plug is engineered to deliver optimal ignition performance, ensuring that your engine runs smoothly and efficiently. The lightweight design minimizes strain on your engine while maximizing power output, making it a perfect fit for various vehicles.
The HKS Super Fire Racing M40LF is compatible with a wide range of vehicles, making it a versatile choice for car enthusiasts. Whether you're tuning your daily driver or racing on the track, this spark plug will help you achieve better throttle response and improved fuel efficiency.
Users have reported noticeable improvements in engine performance after installing the M40LF. Many appreciate the enhanced acceleration and smoother operation, particularly in modified vehicles. This spark plug is often praised for its reliability and efficiency, making it a go-to choice for those seeking performance upgrades.
Other Part Numbers:
HKS #hks50003-M40LF
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Since its beginning, HKS has been committed to providing well-integrated, reliable,and environmentally sound performance systems. Mr. Hasegawa's strong leadership, engineering genius, creativity and willingness to listen to customers are the pillars of the company's success. Monitoring consumer reaction and input on issues pertaining to material quality, external appearance, sound quality, and of course, performance, HKS stays in tune with automotive enthusiasts' needs. Moreover, HKS' products are designed to be user friendly for easy installation.
HKS provides a warranty to the original purchaser of HKS exhaust systems against defects in materials and workmanship for a period of one year. The warranty applies only for vehicle specific exhaust systems. Other products such as metal catalyzers, front pipes, exhaust manifolds, and center pipes are not covered.