Being repetitious, not uncommon to see results 'similar to' topic with these ecotec engine cartridges. This one perhaps more than some, but I've seen similar before. In the past, installation has been blamed, but even those using preferred method by 'users' have shown some squished appearance. Some inexpensive Protec cartridges have had good results posted here. The US made Hengst OEM, has had 'some' decent results but now cap must be purchased as package. I'd try another brand to see if some improvement with it.