Stock exhaust size? 1986 K20 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

VTKidder · 11-07-2007, 12:01 PM

I have been unable to find a good diagram showing the exhaust system for my 1986 K20 350; I know Walker has good diagrams, but everything I find is about 1"x1" and I cannot read part numbers or pipe sizes. I need to know what size the exhaust is that comes off each manifold so I can buy additional pipe and fab up a cheap system. It is a dual system; no y-pipe. Thank you to whoever can help me.

**Captkaos** · 11-08-2007, 02:29 PM

2.25" diameter.

11-07-2007, 12:01 PM	#1
VTKidder Registered User Join Date: May 2003 Location: Vermont Posts: 996	Stock exhaust size? 1986 K20 I have been unable to find a good diagram showing the exhaust system for my 1986 K20 350; I know Walker has good diagrams, but everything I find is about 1"x1" and I cannot read part numbers or pipe sizes. I need to know what size the exhaust is that comes off each manifold so I can buy additional pipe and fab up a cheap system. It is a dual system; no y-pipe. Thank you to whoever can help me. Last edited by VTKidder; 11-07-2007 at 12:01 PM.

11-08-2007, 02:29 PM	#2
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Stock exhaust size? 1986 K20 2.25" diameter. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

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