Is pectus exavactum does make ppl die younger?

No: It is compatible with a normal life span. It is a surprisingly benign defect and it does not compress the heart.

Pectus Excavatum: The life expectancy of most patients with pectus excavatum should be normal. However, severe cases may have cardiac compression. Cardiac dysfunction and arrhythmias have been reported with severe cases. Moreover, some cases may be associated with marfan's syndrome. For that reason, evaluation by a physician with expertise in the management of pectus excavatum is recommended.