I'm pretty sure its a boost leak but I cant find it for the life of me. I did the non-sequential conversion so there arent many hoses anymore and I tightened all the couplers a hundred times and I still get this whistling starting around 3400rpm or so and it gets louder the higher the rpms. It gets so loud that it drowns out other peoples exhausts.

Funny thing about it is that the whistling started when the weather started getting warmer. This morning it was 45º out and there was no whistling at all. Any suggestions as to why it would only whistle in warmer weather would be appreciated, I searched and didnt find anything.