Too big ???

[67 455 Bird ragtop]

All the mags have done test before and ALL revealed that the larger pipes did not hurt HP or Torque on anything tested.



That oval tubing doesn't have the same flow characteristics as round. It's less. The oval tube sales sights have the flow comparison listed as a size comparison, i.e. 3 -1/2 oval equals 3" round (just an example, not fact! but it is significantly less).

Thanks. Looks like I may need to do a little more research.