i put a 2000 ls head on my 92 integra and now i have a air leak where my down pipe and my catylac converter connect i tighten the bolts and it doesnt connect all the way. where i tighted it doesnt push the pipe all the way together but bends the whole thing so it looks like a C shape. what do you guys recomend that i do? change my headers and down pipe to a 2000 or just go the shop and have them extend the pipe and welded to have it perfect?