Notices
964 Forum
Sponsored By:
Sponsored By:

Replacing primary muffler with bypass...muffler straps?

 
Old 02-07-2019, 03:20 PM
  #1  
makoshark72
Addict
Rennlist Member
Thread Starter
 
makoshark72's Avatar
 
Join Date: Aug 2014
Location: Gig Harbor, WA
Posts: 303
Default Replacing primary muffler with bypass...muffler straps?

Do I reuse the 2 original muffler straps? Since muffler diameter is much larger than the bypass pipe, they seem way to long...
'89 C4...
Thanks.

Last edited by makoshark72; 02-07-2019 at 03:47 PM.
makoshark72 is offline  
Old 02-08-2019, 04:13 AM
  #2  
John McM
Addict
Rennlist Member
 
John McM's Avatar
 
Join Date: May 2001
Location: Auckland, New Zealand.
Posts: 11,832
Default

Originally Posted by makoshark72
Do I reuse the 2 original muffler straps? Since muffler diameter is much larger than the bypass pipe, they seem way to long...
'89 C4...
Thanks.
Mine have specific straps for the bypass. The originals are far too big. As there are many brands of bypass you may need to find the exact match.
John McM is offline  
Old 02-08-2019, 09:07 AM
  #3  
Pasman
User
 
Pasman's Avatar
 
Join Date: Dec 2010
Location: MoCo Maryland
Posts: 41
Default

Bypass pipe should come with its own specific straps.
Pasman is offline  
Old 02-08-2019, 12:01 PM
  #4  
makoshark72
Addict
Rennlist Member
Thread Starter
 
makoshark72's Avatar
 
Join Date: Aug 2014
Location: Gig Harbor, WA
Posts: 303
Default

Bought used from Rennlister, straps weren't included..seems guys are using heavy duty hose clamps...
Thanks.
makoshark72 is offline  
Old 02-08-2019, 01:39 PM
  #5  
Bigsix964
User
 
Bigsix964's Avatar
 
Join Date: Sep 2018
Location: NYC Area
Posts: 37
Default

I re-used my originals by drilling / bolting it together at a smaller diameter.
Bigsix964 is offline  
Old 02-08-2019, 06:30 PM
  #6  
makoshark72
Addict
Rennlist Member
Thread Starter
 
makoshark72's Avatar
 
Join Date: Aug 2014
Location: Gig Harbor, WA
Posts: 303
Default

Originally Posted by Bigsix964 View Post
I re-used my originals by drilling / bolting it together at a smaller diameter.
Actually a great idea. The ones sold by FVD are 330mm, or 13". Might try that, thanks.

makoshark72 is offline  
Old 02-08-2019, 06:31 PM
  #7  
Super90
Addict
Rennlist Member
 
Super90's Avatar
 
Join Date: Mar 2004
Location: Texas
Posts: 689
Default

I took original Porsche muffler straps, cut them and welded them shorter to fit.
Super90 is offline  
Old 02-08-2019, 06:33 PM
  #8  
makoshark72
Addict
Rennlist Member
Thread Starter
 
makoshark72's Avatar
 
Join Date: Aug 2014
Location: Gig Harbor, WA
Posts: 303
Default

Thanks
makoshark72 is offline  
Old 02-09-2019, 04:48 PM
  #9  
Jeff P
User
 
Join Date: May 2015
Location: Atlanta
Posts: 16
Default

I bought a stock car except for a primary muffler bypass. I knew it would be a little louder than stock, but I found it much too loud. I lived with it for a few years but just put a primary muffler back on. I love it. I think stock sounds so much better. Of course thatís totally subjective.
Jeff P is offline  
Old 02-09-2019, 07:36 PM
  #10  
John McM
Addict
Rennlist Member
 
John McM's Avatar
 
Join Date: May 2001
Location: Auckland, New Zealand.
Posts: 11,832
Default

Originally Posted by Jeff P
I bought a stock car except for a primary muffler bypass. I knew it would be a little louder than stock, but I found it much too loud. I lived with it for a few years but just put a primary muffler back on. I love it. I think stock sounds so much better. Of course thatís totally subjective.
I like keeping the option open to go back to stock as I has factory cat bypass for power and some extra noise.

One thing to think about before you cut up OE parts is the cost to replace them. OE muffler straps are $$$
John McM is offline  
Old 02-10-2019, 11:52 PM
  #11  
makoshark72
Addict
Rennlist Member
Thread Starter
 
makoshark72's Avatar
 
Join Date: Aug 2014
Location: Gig Harbor, WA
Posts: 303
Default

Originally Posted by John McM View Post
I like keeping the option open to go back to stock as I has factory cat bypass for power and some extra noise.

One thing to think about before you cut up OE parts is the cost to replace them. OE muffler straps are $$$
Yea, I have to agree. Original parts can be too hard and $$ to come by. I used two heavy duty SS T-bolt clamps, worked great. I also like the ability to go back to stock....
makoshark72 is offline  
Old 02-11-2019, 12:12 AM
  #12  
Bigsix964
User
 
Bigsix964's Avatar
 
Join Date: Sep 2018
Location: NYC Area
Posts: 37
Default

Definitely a very important consideration. I think if I had to re-install a primary that the drill solution would be reversible (barring small holes in the straps). But I donít foresee doing it. The stock exhaust was a little muted for my younger blood. I wanna hear my flat 6 not my cooling fan...
Bigsix964 is offline  
Old 02-11-2019, 01:10 PM
  #13  
mystert
Addict
Rennlist Member
 
mystert's Avatar
 
Join Date: Apr 2015
Location: Encinitas, CA
Posts: 304
Default

I just used large hose clamps on mine and its worked great for 4 years now.
mystert is offline  
 


Thread Tools
Search this Thread

Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: