Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

Is stock exhaust 2.5"? Who makes a 3" exhaust??

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Old 03-21-2012, 12:01 AM
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Default Is stock exhaust 2.5"? Who makes a 3" exhaust??

I can't remember if the stock exhaust (catback) is 2.5" or slightly smaller. If its 2.5", a 2.5" catback won't do anything more for me. Is there a gain to be had on a car with my mods by running a 3" catback?

I'm thinking a nice 3" catback with some electric cutouts for when I want it really loud would be nice. It's just a little much the way it is right now. I like it but the neighbors hate me coming in late at night. Lol
Old 03-21-2012, 12:13 AM
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Stock is stainless 2.5", B&B makes the only 3" that I know of and its a total waste of money unless your making stupid power. Just buy cutouts and have them welded in. I put a DMH on my car and have no complaints.

Buy some maganflow straight through mufflers to have welded in as well itll be like 175 for just the mufflers.
Old 03-21-2012, 12:13 AM
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Billy Boat is the only premade one that I know of. You could always drive down to an exhaust shop and let then weld on up. The V has really straight runs so it shouldn't cost an arm and a leg.
Old 03-21-2012, 07:49 AM
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Originally Posted by NeverSatisfied02
I can't remember if the stock exhaust (catback) is 2.5" or slightly smaller. If its 2.5", a 2.5" catback won't do anything more for me. Is there a gain to be had on a car with my mods by running a 3" catback?

I'm thinking a nice 3" catback with some electric cutouts for when I want it really loud would be nice. It's just a little much the way it is right now. I like it but the neighbors hate me coming in late at night. Lol
As said before, you won't make gains from a 3" exhaust but I do love the sound my B&B makes, definitely a bit louder than your regular 2.5 magnaflow/corsa and as a benefit it won't rust out after a week unlike some others *cough*magnaflow*cough*.
Old 03-21-2012, 08:29 AM
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Thanks for the info fellas and for saving me money. Cutouts are the plan then and I'll just weld some stainless muffs in with some nice stainless mag tips.
Old 03-21-2012, 11:03 AM
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To be honest my corsa sport is already starting to irritate me after the header instal. Gets too loud for me past 4k rpm. I am also catless. Couldn't imagine the car louder, id have to cut the headers off. Cutouts are loud yet can be closed off which makes them a nice investment...
Old 03-21-2012, 11:12 AM
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Exactly why I think I'm going to run the regular offset/center stainless magnaflows with magnaflow tips and then get cutouts so I can have it loud when I want it loud and subtle when I don't want the noise.
Old 03-21-2012, 11:38 AM
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Stainless works makes a full exhaust system too. i got the full system, including headers/wcats used for cheaap

I agree 3in is not necessary but it sounds badass.. Fitment is good but you really have to manhandle it on a jackstands or a lift to get it all lined up and tight to the underbody.
Old 03-21-2012, 11:46 AM
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Forgot about them. If I find a deal on a stainless 3" system, I'll snag it. If not, I'll just weld into what I have.

Anyone selling a nice used catback?
Old 03-21-2012, 01:45 PM
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We make a nice 3" system for the car. The market at the moment loves 3" but a lot of cars really don't have to have a system that big.

We feel that a 2.5" dual system becomes restrictive at about 500hp. Stepping up to a 3" could help the car out especially if you go with a chambered muffler to quiet it down some so your neighbors become friendly again. Add cut outs for when you want it crazy.
Old 03-21-2012, 02:04 PM
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What do u guys sell the 3" system for? I may go 3" just so the car has room to grow since its already making good numbers.
Old 03-21-2012, 05:09 PM
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I run a single 3" downpipe into a cutout, and then into a single magnaflow straight through muffler dumped at the axle. I lost 30rwhp with the cutout closed. I personally dont see the actual dual 2.5" piping becoming restrictive it would be the mufflers if anything.
Old 03-21-2012, 05:59 PM
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Talkin about the cobra? I'm assuming so since I don't see any way to make a single 3" system work on the V. Lol I'll need 2 2.5" cutouts for this one. And ur right... I don't see how dual 2.5" would be any more restrictive than single 3". It prob is the muffler if anything.

Guess I'll just run cutouts after the headers for "business" and then just get a nice pair of muffs and tips so it will be more subtle when needed.
Old 03-21-2012, 07:55 PM
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That sounds like a good plan. I personally like the drastic contrast between a quiet muffler system and open cutouts... much more dramatic.
Old 03-21-2012, 08:33 PM
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Yeah... I'm the same way. Love it loud so u can hear the cam hittin but at the same time, a quiet pair of mufflers for highway drives and late night entries to the neighborhood would be nice.
Old 03-21-2012, 08:52 PM
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Originally Posted by NeverSatisfied02
Yeah... I'm the same way. Love it loud so u can hear the cam hittin but at the same time, a quiet pair of mufflers for highway drives and late night entries to the neighborhood would be nice.
If you ever have to take the 8.8 kit off, I want to take some pictures and measurements as I think I can build all of the brackets.

How do you like your cam?
Old 03-21-2012, 09:03 PM
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I'll see what I can do for ya. 8.8 was installed by my buddy who I bought the car from. I'll see if he has some helpful info for ya. And I love the cam. Wanted bigger (like the MS4) for sound purposes only but my cam sounds stout and runs extremely well
In the car.



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