I was wondering if someone could please tell me the stock TB size on a 97 5.4
Thanks

 

I could be way off but 75mm I think. Search for posts by "Neal", you should find it there.

 

HI!... The stock TB size on all TRITON 4.6/5.4's are 70mm at the butterfly. It is only 68mm before the TB. It can be ported/polished out to a TRUE 70mm though.

 

What good would porting it do? I've read about people doing things (can't remember exactly what now) to their TBs and getting improvements. Just how true is this? What could I do that wouldn't cost ridiculous amounts (greater than say, $350)?