Isnt The Once Piece Better For Flow? The Amount Of Times Id Have To Change My Oil Pan Gasket And The Amount Of Times I Drive I Think Id Rather Have The 1 Piece. Which I Used To Until Turbo Came Along. You Might Be Able To Do It. What I Would Do Is Lossen The Bolts On Top The Header Then Take It Off The Cat And Let It Hang To Give You Some Room. Im Sure Its Not Bad. Even Still, Take The Header Off But Let It Hang, You Dont Have To Take It Out Of The Car, Just Need A Bit Of Room