 so how exactly do these wokr properly lol??? im using them for the gr28r's , when i bolt them on will they come out in the same spot aas normal downpipes would? i ahvent seen this style downpipe installed. also what about 02 sensors, doesnt look like theres holes for them... any help wiht these i would appreciate. never seen them before. i will use them if they work the same as any other ones will. also they are split... bad thing? thanks for the answers an help i jus want to know any advantages or if they are just garbage lol...
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