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Old December 3rd, 2016, 04:22 PM
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Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
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Default Re: Proper sized exhaust

Quote:
Originally Posted by bigblockv6 View Post
I'm pretty happy with 2 1/2 inch duals and 50 series mufflers on my 68 478M, of course that's the same system when I had the 305E, In the future I may switch over to 3 inch pipes and 40 series mufflers
That 478 will love 3 inch. haha There's actually a guy who's done it. Not sure if you've seen the vid. https://www.youtube.com/watch?v=liKIlN9Z9Jg

I've been wanting to go back to the exhaust guy and try some other mufflers for sound reference.
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"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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1964 Chevy C20 292/SM420
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