Tb
On my 91 mustang with a vortech, I tried a pro prod 70mm tb and it whistled out the linkage from the get go. After a couple of 10lb pulls it was bad. Sent it back and they were suppose to send me a new one. But due to the marks I put put on it, it was the same one I'd returned, when I got it back. threw it on an sure enough it whistled like a beetch. tried a BBK and throttle blade would stick. Tried sanding adjusting everything no bueno. got an accufab, and its perfect. So I got a 75mm on my 90sc i figured since the TB wasnt on the pressure side a pro products should be alright. And it works fine, but really no performance increase with my mods.? Did a nice port job on intake too. I would have left it stock to do it over, my motor is as good as I want.?? Hope this helps