Did you check that your motor mounts were in good shape? TTI lists the measurements for that somewhere.Must have been a bad day at TTI as both my front down pipes hit the torsion bars stock manifolds and had to do plenty tweeking to get it to fit right and for what it cost it should fit perfect Not real happy Mechanic for a liveing so not my first exhaust and all mounts are new .Headers next time and build my own system like i always have