Just a Borla Muffler

[tw627x]

I tried the search function with no avail..

 

I know they make cat back systems, but what about just buying a muffler and using stock piping? I haven't seen part numbers for the muffler that would normally come with the cat back system. anyone know or have any ideas?

[Chris]

I dont know for the new trucks, but for the past gens there were a couple part numbers floating around

[Asells]

You can buy just the s-type muffler. I was thinking about doing the same thing you are wanting to do.

[tw627x]

You can buy just the s-type muffler. I was thinking about doing the same thing you are wanting to do.

Do you know where or part number

[Asells]

Heres the part number: 40842S. Can buy them on borla's site or amazon. If you do this id be curious how it will sound.

[Chris]

Downside is the S type only comes in 2.5"

[tw627x]

is this basically the muffler that comes with the dealer installed borla? just with a single outlet instead of dual?

 

one of the reviews on amazon said they put it on their 2014 and had a lot of drone. Borla swears their systems dont have drone so now im confused.

[jeffsig]

The difference between the GM Borla and other versions is also the flapper valve to ensure no drone in V4.

[tw627x]

The difference between the GM Borla and other versions is also the flapper valve to ensure no drone in V4.

Can you leave the stock flapper in?

[07Softail]

Can you leave the stock flapper in?

Yes just cut the muffler of before the valve and weld the new muffler on. Now if the inlet and outlet size is 2 1/2" you will have to get the ends expanded to slip over the pipe.

 

RT

[Chad2815]

I was thinking about getting the PROXS, had it on my Avalanche which also had V4 and it sounded great. They make it with 3 inch in and out too. They have 2 different part numbers with and without flange though, Indont really understand that part.

[No Tyme]

I purchased just a Borla 1 in 2 out at Jegs, 157-40349 for $112 and had a local muffler shop install it. They bent the pipes and finished it off with a pair of stainless tip... Still getting louder. Luv it!

BTW, they did a price match with Summit so I got it for less than the site price.

 

http://www.jegs.com/webapp/wcs/stores/servlet/KeywordSearchCmd?storeId=10001&catalogId=10002&langId=-1&Ntk=all&Jnar=0&itemPerPage=60&Ne=1%2B2%2B3%2B13%2B1147708&searchTerm=157-40349+

[brwk]

How does it sound in V4 mode?

[No Tyme]

It has that helicopter sound to it... I did not install then flapper valve from OEM system. Doesn't bother me much... You can buy a Range and plug in to the OBI Port to eliminate the V4 mode or do a custom tune to eliminate sound.