🔥 Boost Performance with DENSO IK16 Iridium Power Spark Plug - 4-Piece Ignition Plugs Racing Upgrade Review

This product did not work as advertised and was a complete waste of money. The "upgrade" did not enhance my automotive ignition in any way and actually caused more issues. The only positive is that the parts arrived on time. Save your money and go with a trusted brand.

They do not fit my Mercedes cls 55 amg 06. The threaded part is half an inch shorter than the original. forks. They are let into the cork hole. Another guy captured that with his e46 amg. Read in the comments

Replaced the platinum plugs with these and reduced lap times by 0.55 seconds! My 16 year old son asked what I did because the car was much faster on the track. It sounds even better. like he's angry haha! Will definitely use them in all my race cars in the future.