HKS 50003-M45IL super fire racing spark plugs for cars

I had these installed in my 2019 Kia Stinger 3.3 as part of a performance upgrade at 14miles. The recommendation is to replace them at 30,000 to 35,000 miles. I replaced them at 50,000 miles. I set the gap at 0.022 and they work fine. Well worth the money.

This product is not for your stock Buick. Great functionality if you have an aggressive car, or you have installed a aftermarket tune like LAP3 or JB4. They are worth the price.My vendor could have packed them better, box came crushed, but they were fine after install.

What can I say, a noticeable difference in performance

The poor reviews are very misleading here. This is THE plug to use in the Stinger/G70 3.3t platform. I set the gap to .024 and car runs beautiful with JB4 set to Map 3 running 93octane gas.

I think it’s ridiculous that this company has a listing that does not stipulate the quantity you’re purchasing. As it turns out ordering one, one is not set for the specified vehicle. One is individual as in one $35 spark plug. Granted these plugs are not cheap, but I found the $35 for a single pod to be not only outrageous but the listing is misleading.