'72 small block header pipe configuration

[Dan P.]

Were there is any differences in the header pipes (that's the front section of exhaust pipe) between the 4-spd and auto equipped cars?

I believe there was a difference in the center section - but not sure about the section that bolts to the exhaust manifold. Thanks!

[Dave S.]

Re: '72 small block header pipe configuration

Were there is any differences in the header pipes (that's the front section of exhaust pipe) between the 4-spd and auto equipped cars?

I believe there was a difference in the center section - but not sure about the section that bolts to the exhaust manifold. Thanks!

Dan,
Both front pieces (header pipes) are different. Right rear is different. The only common piece is the left rear.
4 speed - Rt. frt.is 334922 L. frt. is 334921
4 speed - Rt. Rear is 3960604 L. Rear is 3960603
THM - Rt. frt. is 334924 L. frt. is 334923
THM - Rt. rear is 3960606 L. Rear is 3960603

The service mufflers and exhaust tips were the same for 4 speed and THM. Muffler numbers were 3960601 for the left and 3960602 for the right. The tips were 3974659 for the left and 3974660 for the left.

The numbers listed for the rear pipes are service numbers as the 1 piece rears (including muffler) on the original systems were never made in service.

[Dan P.]

Re: '72 small block header pipe configuration

Thanks, Dave. Your info is helpful and greatly appreciated!