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**kwmech** · 07-04-2007, 03:26 PM

2-1/2'' pipes off the cast iron manifolds into a flowmaster Y pipe then into a single 3'' muffler and pipe. That is more than what is needed for a stock big block. That is what i had put on my longhorn. My 68 GMC has a 396 in it. The previous owner had headers put on it with dual 2 1/2'' and the stock air cleaner with the 1 1/2'' intake for the snorkle--go figure. I'll be changing that when I convert to 4wd

07-04-2007, 03:26 PM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,718	Re: BBC guys: What exhaust do you have? 2-1/2'' pipes off the cast iron manifolds into a flowmaster Y pipe then into a single 3'' muffler and pipe. That is more than what is needed for a stock big block. That is what i had put on my longhorn. My 68 GMC has a 396 in it. The previous owner had headers put on it with dual 2 1/2'' and the stock air cleaner with the 1 1/2'' intake for the snorkle--go figure. I'll be changing that when I convert to 4wd Last edited by kwmech; 07-04-2007 at 03:29 PM.