Dual Exhaust - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 09-03-2014, 04:57 PM

Someone said the other day that dual exhaust wasn't available from the factory. I said it was, but wanted to back that up, so:

According to the GM Heritage center, option L47 was the 400V8 (big block). A few notes:

- Includes four barrel carb and dual exhausts
- Not available with 4-speed
- Not available in California on the C10s (ok on C20 and C30)

So, dual exhaust was indeed available and apparently standard with the big block. Mine has hangers on both sides of the frame, and from other posts it appears not all do. So maybe they riveted on the hangers only if you had dual exhaust.

The whole big block package included HD springs, dual exhaust, and a couple of other items and was only $169. Even if you think of that as $1700 today that's not bad. Except for fuel economy who wouldn't?

**special-K** · 09-04-2014, 09:40 AM

Dual exhaust was never an option. It came on all big blocks and was unavailable on everything else.

67JimmyMO · 09-04-2014, 09:58 AM

Interesting info, thanks. I was the guy wondering about those brackets being on both sides of the frame...sounds like it may be tough for me to come up with some.

09-03-2014, 04:57 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Dual Exhaust Someone said the other day that dual exhaust wasn't available from the factory. I said it was, but wanted to back that up, so: According to the GM Heritage center, option L47 was the 400V8 (big block). A few notes: - Includes four barrel carb and dual exhausts - Not available with 4-speed - Not available in California on the C10s (ok on C20 and C30) So, dual exhaust was indeed available and apparently standard with the big block. Mine has hangers on both sides of the frame, and from other posts it appears not all do. So maybe they riveted on the hangers only if you had dual exhaust. The whole big block package included HD springs, dual exhaust, and a couple of other items and was only $169. Even if you think of that as $1700 today that's not bad. Except for fuel economy who wouldn't? __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

09-04-2014, 09:40 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: Dual Exhaust Dual exhaust was never an option. It came on all big blocks and was unavailable on everything else. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

09-04-2014, 09:58 AM	#3
67JimmyMO Registered User Join Date: Jun 2014 Location: Southwest MO Posts: 115	Re: Dual Exhaust Interesting info, thanks. I was the guy wondering about those brackets being on both sides of the frame...sounds like it may be tough for me to come up with some. __________________ 1967 GMC SWB 383 Stroker w/Saginaw 4sp 1979 Chev C30 Scottsdale Flatbed 350 4sp 2000 Chev 3500 Flatbed 454 Automatic 1978 GMC 6500 Flatbed Dump 366 5sp + 2sp 1965 Chev K10 LWB 230 4sp 1985 Chev K30 Flatbed 350 4sp



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