Did an up pipe for a customer and they wanted the cheapest one possible....turbo exhaust inlet is crusty rusty but even when the y pipe is seated in it I still get a lot of wiggle...like the inner flange on the cheap up pipe is too small... I can't get it to seal...should I get a higher quality up pipe or is the rusty turbo side causing it to not seal? Tia what up pipes do you guys recommend