| | | quote | Originally posted by unboundmo:
One reason is that I would want 1 3/4" headers instead of 1 1/2". I've heard through other vendors that the 1 1/2" is a little too small and they recommend 1 5/8"....
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On a 173 ci engine the last thing you want for the street is a 1 3/4" header. You need extraction quality in the pipe and 1 3/4" is just too big for the ci displacement. I've seen figures that indicate 1 1/8" is good for low end torque on the 2.8 (173 ci) and the optimum for high speed and low end torque is 1.5". The 1 3/4" are used for larger engines like the SBC and even then a 350 ci can work pretty well with 1.5.
Definitely stay away from 1 3/4" unless you want a WOT racing application
Arn
