not drilled is ok
no the hole should not be pre drilled because some of these cars have the o2 on the manifold. and a lot of manifolds are cracked and have been interchanged around.
Front Pipe
Verified Buyer -
Had to change rear hangar mount. Oterhwise perfect fit.
Bottom Line Yes, I would recommend to a friend
great fit
the place where the O2 sensor goes should be cut out already.
Bottom Line Yes, I would recommend to a friend