ok stupid question, but anyways since my turbo exhaust outlet and my downpipe are both 3" v band and the v band flanges are 3.5-3.75" in diameter, then why doesn't my v band clamp(3.5" clamp) that i just ordered doesn't tighten them down. i tried tighting it all the way and it's still wiggling..WTF!! sorry still a noob w/ v bands stuff...btw i also tried a 3" clamp and was way to small....

 

you sure you used a 3 inch? my 3 inch v band clamp works just fine no leaks.

 

yes i'm sure, and like i said the first one i ordered was a 3" clamp and when i recieved it, it couldn't even go all the way around the v band flange..that's why i bought a 3.5" clamp this time but it's also a little to big...could it be that the 3.5" clamp that i got is defective?

 

You need a 3" vband clamp. I personally had to have my downpipe v-band flange shaved down because it was too thick for the clamp to go over both at the time, and then the 3" worked just fine.

 

but why did the first one i bought which was a 3" clamp wouldn't even fit around the flange itself?