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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: flatford39 on April 08, 2014, 10:45:20 pm

Title: OEM Exhaust parts
Post by: flatford39 on April 08, 2014, 10:45:20 pm

Need to change out the exhaust system on my 1980 K10 with a 350 engine. This is a full size pick up. It now has replacement dual exhaust that need to be changed out. I want to go back to the factory single exhaust using the Y pipe exhaust. It would appear from the brackets that the tailpipe exited out the passenger side just behind the rear tire. My questions are did this vehicle come with a single outlet muffler or a dual outlet muffler?? When I look at Walkers web site and others they show it both ways and they also show it exiting on the drivers side which I am sure is wrong.

Where is a good place to go (online possibly) for OEM exhaust parts???

Thanks in advance for any help.

Title: Re: OEM Exhaust parts
Post by: bake74 on April 09, 2014, 08:08:38 am

     In our tech section, the GM Heritage (http://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Chevrolet-Trucks/1980-Chevrolet-Truck.pdf) link is included, on page 8 for K10-20's is listed "Exhausted System=Single;Aluminized".
     Starting on page 23 The exterior pictures start showing the exit for the exhaust behind the drivers tire, but I could not find anything written that states all were single exit after drivers side.
     GM Wholesale Direct (http://www.gmwholesaledirect.com/?gclid=CNjdkbu8070CFVBffgodG4oAjA) sells OEM part and aftermarket parts.

Title: Re: OEM Exhaust parts
Post by: timthescarrd on April 09, 2014, 11:02:54 am

My 83 still has factory exhaust (for the moment), it's y-pipe into cat, single pipe on driver's side, dual outlet muffler

Title: Re: OEM Exhaust parts
Post by: flatford39 on April 09, 2014, 07:21:42 pm

Bake & Tim..thankyou for your direction. I appreciate it. I have to crawl under the truck again tomorrow but I am sure I have a factory hanger on the passenger side that supports the tailpipe after the muffler and in front of the rear axle. There is a universal hanger on the driver side in the same location that looks like it was added. I need to crawl under there again and verify.

Again thank you for taking the time to respond.

Title: Re: OEM Exhaust parts
Post by: Captkaos on April 09, 2014, 08:29:48 pm

Walker and Hooker are the closest bet.  Most later 1981+ trucks were single exit, some of the earlier ones with a Cat (1975 and later ) were Y into single and split to 2 rear exit.  Only the pre 75 were actually offered with Dual if I remember correctly.

Title: Re: OEM Exhaust parts
Post by: audrima on April 10, 2014, 03:22:44 am

on my 78 C25 hd which still has factory exhaust, is a y pipe straight to single muffler on the drivers side.


Mariah