i recently installed the throttle body spacer on my 2005 ram 1500 an now it makes a high pitched whistle when driving, i was just wondering if thats normal

 

They can sometimes cause a whistle sound, but im wondering why you wasted your money on that useless piece of junk ?.

 

???

 

Not really the right forum to ask Dodge related ?s but since y'all done did...
You might have a leaky gasket seal.. check that it has a good flat clean surface all around on both sides of the original parts sometimes bits of old gasket stick to the original surfaces and the new gasket can't sit flush to the metal causing leaks.
also make sure you have gaskets on both sides of the Helix thingy to ensure a good tight seal.
This should help...

 

I know I'm a little late to the party, but the whistle is normal. In addition to 4x4 I'm an avid tuner enthusiast and the 8th gen civic has a whistle with the spacer also.