DocHolliday

I'm about to order my exhaust and just wondered why folks chose to order one over the other. this is really my first venture into aftermarket exhaust so I'm sort of in the dark.

I have NPP an would like to maintain the function of it being quiet in tour mode so I am thinking Borla may be the only option for that functionality. Have I misunderstood? Is there something else I should consider?

Mr Guns

Billy Boat also has exhaust systems that integrate with the factory NPP system, so you might want to check that out as well. LMperformance is running a big sale right now on all the exhaust systems mentioned, so it's a good time to buy. I don't have npp, so I'm going with the Billy Boat bullets. I'm ordering tonight (as soon as my wife goes to bed )

LMperformance sale thread:
http://forums.corvetteforum.com/c7-t...rformance.html

Ben@WeaponX

Corsa is not offering the NPP, regardless of previous statements. I've heard this from an engineer there two different times; despite my dismay.

Andre at Borla just called me a couple days ago and said they finally released theirs and it does tie in to the NPP.

Billy Boat also has an NPP setup available and that's what I have had here for awhile with the Fusion mufflers.

Let me know if you want a setup. As a previous customer, I'll beat all published offers

DocHolliday

Your recommendation is Borla then it sounds, based on my needs? I'm also interested in the black tips which I understand Borla offers?

DriveCorvette

Borla is best.

RapidC84B

Corsa is far and away the best aftermarket exhaust made. Zero drone. I've had them all over owning many C5s and a C6. Corsa is the only one that truly has zero drone.

Ben@WeaponX

Eh when it comes down to it these days, most axle backs on high perf cars are pretty close for early stage mods. It usually comes down to sound preference. When you get into deeper mods like cams, headers, etc is where the major differences come in.

TXArtic

I had a Corsa system on my Challenger I traded in on my new Stingray. I can tell you that the Corsa fit/finish was excellent. The exhaust note was perfect and as advertised there was no drone, even with the MDS active (4cyl mode). Note that the Corsa did get slightly louder after putting about 1000 miles on it.

DriveCorvette

Borla sounds better. I don't use my radio any longer because the car sounds so good. Its all good sound with 0 resonance.

mollygirl

I was wondering what is the best sound that is not obnoxious and not really loud inside the Corvette. Also what is the purpose of the X pipe and does the pipe and or catback affect warrantee?. Does it add to the sound? I understand this is a personal choice. I just want more sound than stock. Any suggestions are appreciated. Thanks

Bigdog9586

I hear all the hype on these aftermarket exhausts and it seems like all everyone is interested in is sound. Sound is great but I never see/hear of the power figures for any of these systems. Are there any?

Greg00Coupe

On the Corsa the X pipe is picking up 10 HP. The mufflers 1 to 2. With a custom tune I picked up 26 total. Search in this section and in the tech section for my dyno sheets and videos of the dyno and tuning. But I am running the full Corsa race system which I understand is only available from a tuner selling Corsa.

Mike15239

I'm a Corsa fan and had them on two of my C6's but going to go to Carlisle and listen to them at the display and decide this time. Had an extreme on my 09' it was a bit loud so went with the touring on my 13' ... Not sure what will do on the C7 yet but did order a supercharger should be in next week. That might help the tone a bit as well.

Greg00Coupe

Good idea Mike going to Carlisle and talking to all the vendors. With the C7 for Corsa there are a lot more variables then with prior Corvette models. There are numerous components available to accomodate other mods you plan. For instance they do not recommend extremes for a car with headers. Another factor is the V4 mode. I had mine eliminated with the custom tune and you need to shut off the valves and motors. So a little more to consider. Good luck hunting, it will work out and you will be pleased.

One thing you won't be able to judge in Carlisle is the droan factor. There is absolutly none with my Corsa extremes and they are LOUD. I hate droan!!! There is more droan with the NPP system then with the Corsa option.

Too bad were 2 hours away or I'd give you a close up tour. But I would recommend considering or at least talking to Smokey's Dyno in Akron. The owner has a C7 with the Corsa and just put twin turbos on it...... tells me the turbos added 200 HP. 330-644-0021 Great guys!!!

SEVETGO

Could not agree more.... had my third set of Corsas and I love them, others advertise NO DRONE, corsa delivers NO DRONE Love the Extremes and they work with NPP

Daekwan06

No drone is pretty much the reason I went with Corsa on my C6.

thespymaster

First, I chose Corsa Xtreme without Xpipe for both sound and looks




Secondly, and price high, but my understanding the MagnaFlow has the NPP function built into it right out of the box!

stingray87xx

Seems like the NPP exhaust is pretty darn good sounding already and it howls when you open it up. Best of both worlds. My own opinion but I think the best sound upgrade would be a set of long tubes if you can get around some of the "rules."

I've been reading around the forum and some claim approx 96dB max from the factory Performance Exhaust option at about 50 feet give or take? Anyone vouch for that?

DocHolliday

Not sure how it is with LTs but I'd say I'm generally disappointed with the NPP exhaust note. It sounds amazing at start up, but quickly becomes pretty mild even in sport mode. I just want to have the ability of using touring mode and making the exhaust quiet and conservative.

stingray87xx

The X pipe gives a crossover section to produce a scavanging affect for the exhaust between gas pulses. VERY simply, without it, each bank would be pulling against itself while the other side is firing, then push against itself when firing again. This is extremely turbulant, relatively inefficient, and quite a violent act also resutling in a loud and choppy exhaust note. H and X pipes are made to fix these issues. They scavange the exhaust, make gas removal more effective, and smoothen out and tone the exhaust note. So it doesn't "add" to the sound but rather tune the sound.

Catback systems should not affect the warranty except for anything related to the exhaust itself, like if the NPP solenoid were to boink up. So if your heads crack as an example, a catback system wouldn't void the warranty for that. Otherwise, find a different dealership.