Amazing technology. I remember paying 49 cents for premium Champion plugs, in the 1960's.
My throttle response has increased and it actually cleared my stinking bureaucratically contrived P0420 cat code.
The tree-hugging bureaucratic clowns didn't win this one because of these great plugs.
I've been using Pulstar plugs for nearly 10 years and they live up to what the manufacturer says about them. Only problem I have is that some cars have
connectors that the heads are small and cannot fit over the head of the Pulstar. Best performance and good plug life.