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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old November 14th, 2019, 12:02 AM
HandmedownGMC HandmedownGMC is offline
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Default Exhaust 305 v6

Hi everyone,
I’m new to this forum but I have a ‘68 GMC C25 with an original 305 v6. It sat for many years and I need to replace some of the worn out/rusty parts. It runs and exhaust isn’t rotted out yet but what is everyone using for an economical exhaust setup from the motor back?
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Old November 14th, 2019, 01:22 AM
bigblockv6 bigblockv6 is offline
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Default Re: Exhaust 305 v6

I have a 68 K2500 and run 2 1/2 inch dual exhaust with 50 series Flowmaster mufflers.
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Old December 8th, 2019, 02:08 AM
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TJ's GMC TJ's GMC is offline
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Default Re: Exhaust 305 v6

Went with 2.25 dual exhaust on my 305 with flowmaster 40's.

Here's an old video. Skip to 1:05 to hear the exhaust.

https://www.youtube.com/watch?v=RCfanx30JO8
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Old December 8th, 2019, 04:42 AM
tbucketnut tbucketnut is offline
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Default Re: Exhaust 305 v6

Has one heck of a nice idle sound. We came through Cave Junc. earlier this year. Really nice area.
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1953 Chevrolet 3100
261 cu inch, SM420
Finished Cab off restoration

1964 GMC 1000
305 V6, SM 420
Restoration is now started, still looking for an oldsmobile style power steering pump
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