Drove to the exhaust shop today - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Yukon Jack** · 05-24-2005, 10:36 AM

Drove the K20 to American Muffler and they are doing their magic as we speak. Truck is running pretty rough, back firing or missing so I've got a problem to figure out. Not good as I know nothing about motors. I was sweating driving it as I could just see getting stranded. My wife would have

at me if I had to call stranded on the side of the road.

Stayed up last night til 1 am getting the passenger door guts installed and getting both doors to latch shut. Figured that would be handy not having the doors fly open driving down the road.

Can't wait to hear how the exhaust sounds. The system is planned to be 3" from the headers to the x-pipe, then 2 1/2" to Dynomax UltraFlo's and continues as 2 1/2" pipe dumping at the rear of the flatbed angled down slightly.

724wdcopper · 05-24-2005, 11:41 AM

how come you're corking it down past the muffs? i usually heard about going the other way, bigger afte the muffs. just wondering. probably have a prefeclty good explaination

**Yukon Jack** · 05-24-2005, 11:47 AM

From what I read 2 1/2" duals is plenty for my mild 454. I will have a pretty substantial bend immediately after the collector on the passenger side so I figured going with 3" in this area would be less restrictive and keeping the X-pipe 3" would make a larger area (less restrictive) at the X than if I had the X-pipe made out of 2 1/2" pipe. I hope that is good in theory.

barn9 · 05-24-2005, 12:10 PM

How many thousands of people did you wake up this morning? LOL! I know mine was a loud sucker with open headers, and I only had to drive it about a mile to the muffler shop. How far did you have to go Mark? Did you have to go clear downtown?

**Yukon Jack** · 05-24-2005, 12:51 PM

I had to drive to Mt. Vernon and Oliver so about 12 miles or so I would guess. Really, nobody seemed to pay it too much attention until I drove by Boeing and 5 people watched me drive by with there jaws dropped.

**Palf70Step** · 05-24-2005, 12:56 PM

What ya say????? Can't hear ya over da pipes.

I can't waiti till I drive my open header system through my yuppee neighbor hood to get pipes

Russell · 05-24-2005, 02:40 PM

I remember how many looks I got driving my 350 on open headers, lol I can only imagine a 454 on open headers!

05-24-2005, 10:36 AM	#1
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Drove to the exhaust shop today Drove the K20 to American Muffler and they are doing their magic as we speak. Truck is running pretty rough, back firing or missing so I've got a problem to figure out. Not good as I know nothing about motors. I was sweating driving it as I could just see getting stranded. My wife would have at me if I had to call stranded on the side of the road. Stayed up last night til 1 am getting the passenger door guts installed and getting both doors to latch shut. Figured that would be handy not having the doors fly open driving down the road. Can't wait to hear how the exhaust sounds. The system is planned to be 3" from the headers to the x-pipe, then 2 1/2" to Dynomax UltraFlo's and continues as 2 1/2" pipe dumping at the rear of the flatbed angled down slightly. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 05-24-2005 at 10:45 AM.

05-24-2005, 11:47 AM	#3
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	From what I read 2 1/2" duals is plenty for my mild 454. I will have a pretty substantial bend immediately after the collector on the passenger side so I figured going with 3" in this area would be less restrictive and keeping the X-pipe 3" would make a larger area (less restrictive) at the X than if I had the X-pipe made out of 2 1/2" pipe. I hope that is good in theory. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-24-2005, 12:10 PM	#4
barn9 Half a bubble off! Join Date: Jun 2000 Location: Winfield, Ks, USA Posts: 5,588	How many thousands of people did you wake up this morning? LOL! I know mine was a loud sucker with open headers, and I only had to drive it about a mile to the muffler shop. How far did you have to go Mark? Did you have to go clear downtown? __________________ Just call me LB. '71 Cheyenne, 402BB, hauls blondes, brunettes, or redheads.

05-24-2005, 12:51 PM	#5
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	I had to drive to Mt. Vernon and Oliver so about 12 miles or so I would guess. Really, nobody seemed to pay it too much attention until I drove by Boeing and 5 people watched me drive by with there jaws dropped. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-24-2005, 12:56 PM	#6
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,997	What ya say????? Can't hear ya over da pipes. I can't waiti till I drive my open header system through my yuppee neighbor hood to get pipes __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

05-24-2005, 11:41 AM	#2
724wdcopper graphic designer Join Date: May 2004 Location: Spokane, Washington Posts: 841	how come you're corking it down past the muffs? i usually heard about going the other way, bigger afte the muffs. just wondering. probably have a prefeclty good explaination

05-24-2005, 02:40 PM	#7
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	I remember how many looks I got driving my 350 on open headers, lol I can only imagine a 454 on open headers! __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)



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