Quick question guys,

I noticed after installing my Y pipe and on cold mornings on startup I would hear a 'hollow' drone that lasts maybe 10 seconds and after then dissappears. It's almost as if the Y pipe piece is flexing or conforming to the incoming hot gases making the noises...nothing loud/annoying. But just out of the ordinary!! Anyone with a Y pipe have similar issues??

 

You mention cold mornings and then the sound... ...or certain tone... ...goes away.

I'd say you're getting an audible example of the impact temperature has on metal.

 

^ yups. nothing wrong with it. it's normal.

 

cool guys thanks, didnt think anything of it as it lasts only a few seconds...just weird how it wouldnt happen with the stock y pipe!!