So I completely scanned my
Exhaust for leaks and i can't figure out why it whistles around 2k rpm accelerating and it didn't do it until I removed the cat and used straight pipe please help this is super annoying

 

Have someone rev to 2000 while you look underneath for the noise? (you better pick someone you trust to hold the brakes)

Try holding a rag over the tailpipe while it's idling. The back-pressure will cause small leaks to get louder so they're easier to find.

 

i did this an found no leaks could it be that my resonator is clogged? would it hurt to completely remove this?

 

Maybe more likely your cat is clogged?

 

i have a test pipe i made out of some stainless 2.25" tubing not more cat it whistles when im say in 5th gear at like 40 mph around 1800 rpm and i start to accelerate at about half to full throttle then it makes the whistle soundish

 

If there is a whistle there is a leak some ware. Check where your flanges meet...the gasket might have gone bad. Also you might be looking in the wrong spots too..try looking around your downpipe and header. Check where your header meets the head also. There lops of spots where it can leak. Like Jim said use a rag and search for your leaks that’s you best bet. There also is another way to try and find the leaks but it’s gonna cause lots of smoke but your cleaning your engine out at the same time. Go buy some sea foam...run it through your break booster line. DO NOT POOR...drizzle it into the line or if you have a spray bottle spray it into the line so it’s more atomized...the line is a vac line so your RPMs will bounce around until you plug the vac line back in. The sea foam will make your car white smoke for about 5min that is burning off all the carbon build up in the engine. Now you should be able to find your leave from the smoke...just block off the muffler with a rag and see if you can see the smoke leaking out of your exhaust anyware. Have to be fast about this though b/c the smoke won’t last and you don’t want to use too much sea foam in your engine it can damage it IF you use too much. It's basically like running really really really high raw octane fuel in your engine.

 

ill have to try the sefoam thing cuz i was under my car while it was running and my buddy plugging the exhaust and i couldnt hear or feel anything

 

I wouldnt plug the muffler for long tho...I'm sure it's not that good