383 to 440 exhaust question.

[GordonGriggs]

I have a 383 now in my 69 Charger and plan on putting in a 440. I have stock exhaust, and stock exhaust manifolds. Will the exhaust hook up without any modifications? The reason I ask is 440's are bigger than 383's.

[A383Wing]

do you plan on using the same exhaust manifolds? If yes, then it should be a bolt in job. Understand that 440 is taller than 383, so head pipes will have to go a little higher to bolt to manifolds.

Bryan

[GordonGriggs]

Thanks! I have enough head pipe clearance on passenger side. But the driver's side head pipe is only about 1/2 inch away from the clutch pedal z bar. I wonder if anyone makes a really think gasket that would fit between head pipe and exhast manifold.

[A383Wing]

A thick gasket would blow out....you could dent the head pipe a little, or just cut the pipe and weld an extension in.

Bryan

[oldcarnut]

Do you have a welded H pipe.  You may have to cut it to get it it to spread right because of the height and width difference of the heads.  I had to on mine anyways as I had a 440 pipe going onto a 383.

[bull]

When I ordered an Accurate Exhaust setup for my 383 there was a communication issue between myself and the shop and I ended up with a 440 setup. There were other unrelated problems involved later but I was told that rather than trade the H-pipe for one that fit a 383 I'd could jut squeeze the exhaust pipes together 1-3 inches. That part worked.

[GordonGriggs]

 
I totally forgot about the H pipe. Mine is not welded, its just clamped.

[ACUDANUT]

Are H-pipes really needed ? I have never used them 

[GordonGriggs]

The car came with a nice exhaust with H pipes. I would not spend the money on them. I know the add to performance but they also make it harder to work on things underneath the car.

[Cooter]

All 90 Degree "V" engines benefit from "Balance" pipes. Commonly referred to as "H" pipes. Lately, referred to as "X" pipes. More HP and Torque.

[resq302]

All I know is that H pipe was a major pain to remove in one piece from our GTX and it was the original factory one.  The individual front pipes would have been a LOT easier to remove from my 383.