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Exhaust FAQs - Stock & Aftermarket Exhaust Topics
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Fun 181
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PostPosted: Thu Dec 11, 2008 10:55 pm    Post subject: Exhaust FAQs - Stock & Aftermarket Exhaust Topics Reply with quote

Another hot topic here in the Thing forum is exhausts. Thing owners have some pretty specific concerns when it comes to exhausts, whether it's stock or performance. Hopefully you'll be able to find helpful information in these previously discussed topics. Note that, like other popular topics, you will find a LOT of overlap in the information discussed, but each topic may also offer unique info that you will find useful.

_______________________________________________________

Thing exhaust systems
OK, here we go...

Rob & Dave's Aircooled Volkswagen Page - Muffler Discussion
A great site that covers all the basics and then some...
http://www.vw-resource.com/muffler_discussion.html

Exhaust question, will this work?
This topic starts off asking about stock exhausts and then goes on to cover many other aftermarket systems...
http://www.thesamba.com/vw/forum/viewtopic.php?t=315515

Ceramic Coated Exhaust
Discussing the ceramic coated Tri-Mil and other systems...
http://www.thesamba.com/vw/forum/viewtopic.php?t=327578

OE style exhaust
A short post regarding the stock exhaust set up...
http://www.thesamba.com/vw/forum/viewtopic.php?t=71718

Aftermarket Exhaust
A great discussion on aftermarket exhaust systems...
http://www.thesamba.com/vw/forum/viewtopic.php?t=243320

Which muffler system rocks your socks off?
More on aftermarket exhausts (like I mentioned above, you'll find a lot of overlap in the information covered)...
http://www.thesamba.com/vw/forum/viewtopic.php?t=218685

Installed the "tri-mill" exhaust from ISP yesterday
More info on the Tri-Mil exhaust...
http://www.thesamba.com/vw/forum/viewtopic.php?t=231061

New "Wild Boar" Exhaust system
An older thread which also discusses the "Wild Boar" exhaust, better known as the Tri-Mil exhaust system...
http://www.thesamba.com/vw/forum/viewtopic.php?t=116767

Which exhaust for easy valve adjustment and good performance
This one starts out with "I know, I know, another exhaust thread." However, there is a lot of great info about different systems (A-1 Sidewinder, Kymco, S&S, etc.) and the ability to access your heads for valve adjustment...
http://www.thesamba.com/vw/forum/viewtopic.php?t=317791

Here is a photo showing the clearance between an S&S merged header system and the valve cover...
Image may have been reduced in size. Click image to view fullscreen.

* "Notice the bracket towards the back(front of car) of the picture. See the rust, it was re-welded there, numerous times. Thats the weak point of the S&S system. That bracket hangs off exhaust port studs for #1 & #3 cylinder." - mattt

Rust protection for muffler?
Some good info on POR-15 and rust inhibitors...
http://www.thesamba.com/vw/forum/viewtopic.php?t=259232

Thing Muffler
A topic that starts out asking about bug "pea shooters" and goes on to cover other issues...
http://www.thesamba.com/vw/forum/viewtopic.php?t=249079

74 muffler
This thread discusses fabricating a stock-looking exhaust system...
http://www.thesamba.com/vw/forum/viewtopic.php?t=242149

Any ideas on exhaust
A lot of redundant info, but also some new info regarding exhaust clamps...
http://www.thesamba.com/vw/forum/viewtopic.php?t=147451

Stock 1973 Muffler Clamps and Nuts and Bolts
More info on exhaust clamps...
http://www.thesamba.com/vw/forum/viewtopic.php?t=144500

Exhaust Fume Question
A topic addressing concerns about exhaust fumes...
http://www.thesamba.com/vw/forum/viewtopic.php?p=1898843

___________________________________________

From The Thing Gallery
Here are a few random exhaust images that you may find interesting...

"Trekker with TypeIII thunderbird muffler"...
Image may have been reduced in size. Click image to view fullscreen.


A freshly installed "Pea Shooter" muffler with J-pipes...
Image may have been reduced in size. Click image to view fullscreen.


A Type 4 with a merged 4-into-1 system...
Image may have been reduced in size. Click image to view fullscreen.


NOS parts and pieces from a 1973 exhaust...
Image may have been reduced in size. Click image to view fullscreen.


Merged and swept off to the side...
Image may have been reduced in size. Click image to view fullscreen.


Another merged header system (appears to be ceramic coated) from Switzerland. Note that this is not a "Sidewinder" exhaust...
Image may have been reduced in size. Click image to view fullscreen.


Here is a photo of a '74 with ceramic-coated heater boxes prior to the exhaust installation...
Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


Installation of a A-1 Sidewinder exhaust...
Image may have been reduced in size. Click image to view fullscreen.

____________________________________________________

After searching through this forum it is safe to say that exhausts have to be one of the most frequently posted topics - ever. Feel free to search on your own, but I went back several years and found that most of the information remains the same, and has been covered multiple times. I tried to compile the most useful and relevant topics above.

I hope you'll find this helpful. I'll update this thread as more info becomes available.

- Slim


Last edited by Fun 181 on Fri Feb 27, 2009 5:38 pm; edited 5 times in total
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Ian Epperson
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PostPosted: Fri Dec 12, 2008 9:27 am    Post subject: Reply with quote

Thanks Fun181! Very useful.

Small nit: Can you edit the post to remove all the &highlight= to shorten up the links and not actually show the highlight on the resulting page?

This:
http://www.thesamba.com/vw/forum/viewtopic.php?p=1898843&highlight=#1898843

is the same link as this:
http://www.thesamba.com/vw/forum/viewtopic.php?p=1898843
But without any highlighting on the resulting page.
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PostPosted: Thu Feb 12, 2009 11:20 am    Post subject: Reply with quote

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joosty_chin
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PostPosted: Tue Feb 17, 2009 1:13 pm    Post subject: Reply with quote

Captain spalding has the best exhaust ive seen, and GMW doesnt have it any longer
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j5josher
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PostPosted: Fri Feb 20, 2009 3:48 pm    Post subject: Reply with quote

just for a hint most of the websites on the posts are outdated and do not show any photo's or info any more...

sad stuff Crying or Very sad Crying or Very sad
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Fun 181
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PostPosted: Fri Feb 27, 2009 10:21 pm    Post subject: Reply with quote

j5josher wrote:
just for a hint most of the websites on the posts are outdated and do not show any photo's or info any more...

sad stuff Crying or Very sad Crying or Very sad


Well, I'd say this is a bit of an exaggeration. I just went through each thread above and found that the majority of the links to vendor web sites work just fine. Obviously, you can't expect any link to eBay or the Samba classifieds to remain current for long.

Yes, a few of these topics pre-date 2007, but the information in these old threads is still relevant, even if a few links and photos aren't showing up. Many of the "dead" links still lead you to a vendor website where you can search for the part you're looking for.

I also found that quite a few of the missing photos are reposts, or are in quotes. As far as I can tell, there is at least one photo of every kind of Thing-specific exhaust, as well as a broad assortment of other exhaust photos currently featured in at least one of the above threads.
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Emeritusx
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PostPosted: Mon Aug 10, 2009 8:59 pm    Post subject: Reply with quote

Tri Mil Exhaust

Image may have been reduced in size. Click image to view fullscreen.

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Solomon Grundy
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PostPosted: Wed Oct 21, 2009 10:37 am    Post subject: Reply with quote

http://www.ssheaders.com/4cylinder.htm

These S&S exhaust systems are great. The one on my '73 is over 15 years old and still running strong. Way better flow for the larger engines then the one's the Thing shop has.

I can adjust the valves with the system on but it is tight and take twice as long as doing my Ghia.

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PostPosted: Tue Oct 27, 2009 6:40 pm    Post subject: Reply with quote

Here's a quick writeup I did for the S&S system many years ago.
Regards, Mondshine
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PostPosted: Tue Dec 15, 2009 8:59 pm    Post subject: New Thing Shop Stainless Steel Exhaust? Reply with quote

I was surfing around and came across this stainless steel exhaust from the Thing Shop. I'd never seen it before. Comes raw or polished.

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PostPosted: Fri Feb 12, 2010 12:25 pm    Post subject: Reply with quote

I have a OE German exhaust on my 73 Thingster, and it has the pea-shooter sized exhaust pipes and no coupling between the left and right sides. It really could do with more have power, and I do have a free-flow header in my parts stash.

I have been off-roading with the SoCal Bajas, and really apreciate the ground clearance and the Thing engine guards.

How much will I lose in clearance, if I replace the OE exhausts?

I am in Vegas right now and will measure my exhaust when I get back on Tuesday, but feel that the extra 5% oomph may not be worth it.
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PostPosted: Sat Feb 20, 2010 8:42 pm    Post subject: Reply with quote

I am really wanting to find the S&S Thing exhaust system. Does anybody know if this is still available in somebody's old stock or a stash somewhere?
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PostPosted: Sun Feb 21, 2010 5:39 pm    Post subject: Reply with quote

sam_w wrote:
I have been off-roading with the SoCal Bajas, and really apreciate the ground clearance and the Thing engine guards.

How much will I lose in clearance, if I replace the OE exhausts?


If it is a Beetle header, I would live with the lower power. I used to have a header on my Thing. It left about 8 inches of ground clearance and stuck out 2in behind the bumper. Basically a horrible departure angle. Ended up backing into a small berm and smashing the exhaust towards the engine tin.

The Tri-Mil Thing exhaust has very good clearance, equal to the stock '74 exhaust. It almost tucks above the lowest point on the rear part of the body, and presents a much smaller profile widthwise. No performance difference compared to my header. If you want to visualize it, the can is 4in diameter and roughly 12in wide. Top of the can is just underneath the bumper, and the rearmost part is about in line with the frontmost part of the bumper. I think the can could do to be moved up some, but I no longer fear running it into the ground.
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PostPosted: Fri Mar 12, 2010 12:57 pm    Post subject: Reply with quote

Does anyone have any idea on how much room The Thing Shop new system leaves for adjusting the valves?


Thanks.
Rob
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PostPosted: Sat Apr 03, 2010 1:29 pm    Post subject: Reply with quote

I have a Kymco 1 5/8 header with a hideaway muffler....fits good. I had to take off the bumper. After...I went to put the bumper on.....I had to do some work...

First- After the system is on..Heat up the exhaust at the collector end of the muffler and push down...slightly.

Then- Bend the bottom of the bumper up/ where it goes back under the car.

This is what I did! The guys at Kymco said it should work without any modifications.. Confused
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PostPosted: Sat Apr 03, 2010 2:17 pm    Post subject: Reply with quote

rrankin wrote:
Does anyone have any idea on how much room The Thing Shop new system leaves for adjusting the valves?


Thanks.
Rob
Answering a bit late, but I had almost that exact same system on my car for years. The mufflers get in the way of adjusting the valves, but I did learn how to do it with them in the way. I picked up a set of angled screwdrivers, but found that a dime was enough to hold the screw in place.

The system isn't an extractor system - it will not give you the additional power that the S&S system will. I went from an S&S header to that divided Thing shop header and lost a few HP.
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PostPosted: Sat Jul 17, 2010 3:23 pm    Post subject: Reply with quote

Ian,

how loud is the thing shop exhaust?
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PostPosted: Tue Jul 20, 2010 3:43 pm    Post subject: Reply with quote

Yarkle wrote:
Ian,

how loud is the thing shop exhaust?


I run one on my 74 with stock 1600 for the last 5 years and it is fairly quiet and gives great ground clearance as nothing hangs under the motor.
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PostPosted: Tue Jul 20, 2010 4:32 pm    Post subject: Reply with quote

thanks! Ive been wavering back and forth between shelling out @200 for the cip1 74 exhaust, which i know will rust out in time, and dropping 400 for the thing shop exhaust, which is stainless steel.

Does the thign shop exhaust still have that kind of "brrrrrr...sound" to it? Not quite a beetle fweem , but still ACVW?
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PostPosted: Wed Sep 08, 2010 9:30 am    Post subject: Reply with quote

I installed the polished Thing Shop split exhaust system on my '74 a couple weeks ago. It fit well and looks great. It sounds good, quiet, but with a liitle purr and rumble. I can feel more power and the motor revs easier. I had the S & S header with twin pipes before, which makes little since. One collector and then bolting on two mufflers and routing forward and the back again? Why ? Next, I had removed the twin S & S mufflers and rewelded a bug glass pack to fit the header and that was a big improvement in flow and weight savings. The polished Split Thing Shop system is even better, It sounds, looks and performs great !
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