what are you guys doing where you downpipe connects to the front of your cat/test pipe? i made a test pipe that basically is a flex pipe with flanges on both ends to bolt into place. and instead of have a ball flange conection between it and the downpipe like factory i just have regular flanges and a gasket bolted together.
anyway ever since ive had this setup it seems like the whole car resonates with the exhaust. its kinda hard to explain, but i dont like it. it never did this with my header and regular test pipe with ball flange. any thoughts?