catalytic converter replacement

I recently had my catalytic converter replaced at nissan mantrade, to remedy the high pitch squeak and ik ikik ( lol ) sound on my livina.

i think this is the replaced part since i looked under the GL and this part seems the not so dirty one so i assume this is it hehe

After installation i did notice the noise was gone but the GL made a new interesting noise lol mejo may vrooom vroom na sound na during acceleration haha also noticed during idle mode may parang rattle sound pero im still checking and troubleshooting if what i heard is right if so ill bring it back to casa to check.

anyway just sharing mga sir

Naeexperience ko din to wala pa kasi mga exhaust parts inorder pa ng mantrade kasi tumama ako sa bato