DENSO Iridium Power Spark Plugs IK16L (4-Pack) - High Performance Replacement for Cars, Trucks & SUVs - Perfect for Engine Tuning & Fuel Efficiency Improvement

Since me other spark plugs were quite perished, these new ones added extra life and zest to my engine performance, My Kia Soul was actually performing so badly I was worried that the transmission was going to expire. Quite the contrary. The performance was so lagging that I had to feather the accelerator and then punch it to keep the transmission from bogging down. If you're having hard shifts in your Kia Soul, you might want to look into changing your spark plugs. These completely altered the performance dynamics pf my car much to my delight!!