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Mod | | | Forums66 Topics128,154 Posts1,056,850 Members48,456 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Sep 2007 Posts: 84 'Bolter | | 'Bolter Joined: Sep 2007 Posts: 84 | Does anyone know if the exhaust y-pipe is the same for a GMC 288 thru GMC 336? I’m restoring a 1958 GMC NAPCO truck back to original condition and I’m keeping the single exhaust. The left and right manifolds dump into a y-pipe that has a collector on the right where the exhaust pipe attaches. I think it’s 2” O.D. pipe. Just wondering if flange angles on Y-pipe match angles on manifolds 288-336. Waldron Exhaust has a kit for ‘57 GMC but don’t know if it will bolt to my 336? Any help appreciated.
Regards,
Craig
1953 3100 | 1958 3/4-ton NAPCO
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