We have been using NGK spark plugs at Smart Service since we opened. The quality and life we see out of these plugs far surpasses most other brands and their performance is better than the plugs that came in your Subaru from the factory! There's no hokey, 8 prong "super performance" marketing gimmicks here, just the proper plug for your beloved Subaru, pre-gapped and ready to install.
We've worked with Six-Star OEM and aftermarket parts for over 15 years. Our 'Gold' Six Star OEM parts are made by the same manufacture who makes the original part for your Subaru. Don't be mistaken our 'Red' Six Star aftermarket (alternative source) parts are put through a rigorous testing and use in our Smart Service shops before we sell them online. Six Star OEM head gaskets are renowned for their superiority to their Genuine Subaru cousins. Though their other maintenance and repair parts are just as amazing with the same great pricing.