The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-27-2020, 02:35 PM   #1
67C10Step
Registered User
 
67C10Step's Avatar
 
Join Date: Jul 2019
Location: Beebe, AR
Posts: 869
Exhaust systems

Anybody buy a kit and do their own? I am starting to plan ahead past brakes, steering, and suspension. Exhaust is on the list. Right now I have a 2 into 1 with the muffler open right before the rear diff.

I'm torn on duals dumping right after the rear diff or taking both all the way to the rear. If I go to the rear I want to do something with both out one side. I don't want to go the normal two out the back route.

Photos of various systems would be appreciated. Step sides even better.
__________________
1967 C10
2020 Toyota 4Runner
2016 Toyota Corolla
2014 Toyota Highlander
2007 Toyota Tacoma
67C10Step is offline   Reply With Quote
Old 07-27-2020, 03:08 PM   #2
sick472
Registered User
 
sick472's Avatar
 
Join Date: Jul 2015
Location: Sedalia Mo.
Posts: 612
Re: Exhaust systems

I can't help you with a kit, but I can tell you that my 85 K20 had headers and dual pipes with mufflers (thrush) that dumped under the bed right before the diff and it turned my bed into a speaker and vibrated horribly at the back glass. I had the pipes extended out the back and that helped tremendously. Whatever you do, take the tips out past the bed somewhere.
__________________
He who is without oil shall throw the first rod. Compressions 8.7:1
sick472 is offline   Reply With Quote
Old 07-27-2020, 03:39 PM   #3
fun in dirt
Registered User
 
fun in dirt's Avatar
 
Join Date: Jan 2007
Location: Mississippi
Posts: 1,819
Re: Exhaust systems

Usually build our own. About to do another one next week & ordered this tube kit yesterday. Looks like it should cover everything (buying bend pieces separately gets expensive quick) https://www.summitracing.com/parts/sum-670146, we'll see when it gets here.
I have learned on these trucks that turn downs dumping before rear differential & sliding back glass will about choke you to death.
__________________
'72 C to K20 "Cannibalizer" http://67-72chevytrucks.com/vboard/s...32#post8653432
'85 K30 "Big Nassy"
'72 Blazer "The Bucket" http://67-72chevytrucks.com/vboard/s...d.php?t=433190
'55 Chevy straight axle gasser https://www.trifive.com/forums/showthread.php?t=173938
'01 2500 Suburban...party wagon
'06 3500 Duramax ...tow truck
'06 Silverado SS...DD
'07 Classic 1500...DD
Built & sold cause can't keep 'em all:
'69 Pro Street Chevelle http://www.chevelles.com/forums/showthread.php?t=332541
'86 M1031 CUCV http://67-72chevytrucks.com/vboard/s...d.php?t=553619
fun in dirt is offline   Reply With Quote
Old 07-27-2020, 03:45 PM   #4
70STOVEBOLT
Broke
 
70STOVEBOLT's Avatar
 
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 5,211
Re: Exhaust systems

I bought a Pypes 2.5 SS header back kit and modified it so I could tuck the exhaust between the frame rails. I have electric cutouts mounted under the tubular transmission mount and Thrush turbo mufflers mounted just behind the crossmember that the driveshaft passes through, and the tips exit behind the rear tires. It's pretty quiet in the cab unless the cutouts are open, but outside it's fairly loud, even with them shut. The truck has a mild 402, not a 250 anymore, I cannot change my signature for some reason.
__________________
70 SWB 250 TH400 "The Needy Beast"
200,000 Mile Club
Drum Brake Club
Daily Driver Club
Owner installed options:
Front Sway Bar
Power Steering
Power Brakes
Cigar Lighter
Courtesy Lights
Deluxe Side Markers
Wiper Delay
70STOVEBOLT is offline   Reply With Quote
Old 07-27-2020, 04:17 PM   #5
68 P.O.S.
Slow Member
 
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,267
Re: Exhaust systems

Several companies make exhaust kits for these trucks. Off the top of my head there's Magnaflow, Thrush, Heartthrob, Pypes, Flowmaster, and Hooker.
__________________
72 C10 lwb fleetside -stock 350/350 combo
68 P.O.S. is offline   Reply With Quote
Old 07-27-2020, 04:20 PM   #6
70cst
Senior Member
 
70cst's Avatar
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 20,056
Re: Exhaust systems

I have Spintech Mufflers ... they have a nice deep sound.
__________________
A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"


Remember: Everyday is a good day...Some are just gooder!
70cst is offline   Reply With Quote
Old 07-27-2020, 05:52 PM   #7
67C10Step
Registered User
 
67C10Step's Avatar
 
Join Date: Jul 2019
Location: Beebe, AR
Posts: 869
Re: Exhaust systems

In particular, I am looking for something that will mate up to the stock rams horn style exhaust manifolds. I want a rumble but don't care to shake windows and scare small children. I'll start poking around some.
__________________
1967 C10
2020 Toyota 4Runner
2016 Toyota Corolla
2014 Toyota Highlander
2007 Toyota Tacoma
67C10Step is offline   Reply With Quote
Old 07-27-2020, 09:19 PM   #8
gmc684x4
Registered User
 
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 455
Re: Exhaust systems

I see lmc has a magnaflo kit for 67 72 trucks
I ran magnaflo on my last camaro nice tone and was a true bolt in affair
gmc684x4 is offline   Reply With Quote
Old 07-28-2020, 08:39 AM   #9
Mts67C10K20
Active Member
 
Mts67C10K20's Avatar
 
Join Date: May 2017
Location: Dowagiac Michigan
Posts: 184
Re: Exhaust systems

I am using the Heartthrob 2 1/4 system with hush thrush mufflers on my 67 K20
Have it 3/4 installed right now
Fits very well
Nice tone but can hear the radio
Mts67C10K20 is offline   Reply With Quote
Old 07-28-2020, 11:05 AM   #10
tdangle
Senior Member
 
tdangle's Avatar
 
Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 822
Re: Exhaust systems

Is this a running truck? If so you may want to consider cost of the "kit" vs having a shop build one for you. I had a 2 1/2" dual system with a crossover and dynomax mufflers and chrome tips exiting out the rear done recently. No headers, using the stock ram manifolds. It cost me $650.
__________________
Terry

1970 Custom Camper/C20 , GM Crate 350/2004R, Dana 60, factory AC
tdangle is offline   Reply With Quote
Old 07-28-2020, 11:35 AM   #11
yellow&white72
Registered User
 
Join Date: Nov 2014
Location: Yukon, Oklahoma
Posts: 23
I did my own exhaust. I bought a flow master ufit 3” stainless steel exhaust kit and magnaflow mufflers. I ran it all the way out the back and tucked them up behind the bumper and pointed them down so the tips aren’t really visible from the back. It was really nice kit made it pretty easy to install and had pieces leftover.
Posted via Mobile Device
Attached Images
   
yellow&white72 is offline   Reply With Quote
Old 07-28-2020, 12:29 PM   #12
Jcfcamaro
Senior Member
 
Jcfcamaro's Avatar
 
Join Date: Jul 2015
Location: Fairfax, Missouri
Posts: 915
Re: Exhaust systems

For what the kits cost I'd talk to a exhaust shop and have them do it. You could order your mufflers but make sure you get the inlet and outlet in the the right position. My buddy ordered a high dollar kit for his monte carlo with a cross over system and we had nothing but troubles with it. Ended up taking it to a shop and having a couple of the pipes bent a little more so it would fit the way he wanted. Make sure it's the last thing you do if your changing rims,tires , suspension ect.
Jcfcamaro is offline   Reply With Quote
Old 07-28-2020, 01:04 PM   #13
my67c20
Registered User
 
Join Date: Jun 2002
Location: Tucson AZ by way of WI & CA
Posts: 460
Re: Exhaust systems

Bought the kit from LMC cause I needed a solution quickly. Easy to install, but was not happy with bends and look. Went to local shop and they tweaked it up for under $200. All in under $500. I see a few shops in your area like Pro Muffler and Exhaust, which does have a picture of a 67-72 in their gallery, so pretty sure you could get the system you want within your budget, especially if you provide a few of the bits. Also check out youtube if you want to get a rough idea of the sound.
my67c20 is offline   Reply With Quote
Old 07-28-2020, 01:22 PM   #14
siggyfreud
Registered User
 
siggyfreud's Avatar
 
Join Date: Jun 2012
Location: Portland
Posts: 1,243
Re: Exhaust systems

Excuse the crappy photobucket watermark, I need to offload my old photos from that crappy site.

I did a custom dual setup on my 66. Ran them through the crossmember:







Then did a tailpipe that wrapped around the fuel tank. It was dual rears, but more centrally located.






Best of luck!
siggyfreud is offline   Reply With Quote
Old 08-01-2020, 02:25 PM   #15
Ben IV
Senior Member
 
Join Date: Dec 2006
Location: Glenpool OK
Posts: 213
Re: Exhaust systems

Just had mine done after my short bed conversion. I considered doing it myself with a kit but a local shop quoted me $500 with mufflers so I went that route. Figured the price of a kit plus mufflers plus down pipes for the stock manifolds I wasn't saving much money doing it myself.
__________________
70 GMC custom
69 GMC panel truck
Ben IV is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:01 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com