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**kwmech** · 07-11-2017, 01:02 AM

If that is a relatively stock engine, putting a set of manifolds would be just fine. 2.5'' out of the manifolds into a single 3'' with a magnaflow. More than enough flow.

07-11-2017, 01:02 AM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,413	Re: '68 C10 with 454 and headers If that is a relatively stock engine, putting a set of manifolds would be just fine. 2.5'' out of the manifolds into a single 3'' with a magnaflow. More than enough flow.