NPP-just noise, no additional power? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Indydriver · 02-15-2014, 03:47 PM

I've got a 2SS/RS vert on order and based on comments I've seen here, I checked the NPP box. I notice on the new Corvette, GM claims a 5 HP increase but not on the Camaro. Is it just a sound enhancement? Will front end breathing improvements such as a CAI and TB porting give a power boost with the NPP or do you really have to go the full aftermarket headers and back approach. I do not want the full time noise of headers--I prefer stealth.

I'd love to hear from those of you with NPP about HP mods you've made. Did you keep or ditch the factory upgrade exhaust you paid for in favor of a better breathing exhaust?

*Camaro_Corvette* · 02-15-2014, 03:49 PM

If I wasn't on my phone right now I would search out some threads for you. Basically, you just opened a big ole can of worms with that question.

Indydriver · 02-15-2014, 04:04 PM

Hey, I'm just lining up the mods so I can get busy when my car arrives. I read through several pages of the DIY forum and it was very helpful. I've already purchased a catch can and 1LE separator, skip shift eliminator, interior cover and gill stripes. I'm thinking the next 2 items will be TB porting and a CAI intake so I'm wondering how these front end breathing mods will work with NPP or do you really need to go headers back (which I dont really want to do) to maximize the front end mods. Just looking for information.

Firefighter · 02-15-2014, 04:14 PM

Check my build thread on my 1LE in my sig. I put down 432HP/422TQ through my NPP. Just bolt on mods. I think it's currently the last or next to last post where I describe what I have.

Edit... look at post #222.

christianchevell · 02-15-2014, 05:05 PM

It opens a baffle and changes the path of the exhaust for a louder sounds and more flow so yes of course it makes a little more power and Camaros were never listed as making more power with it as it was not a selling point as we are just trying to skirt the gas guzzler tax as is, and of course people will say oh its not that better.... Yah Banana Squirts I owned another 2011 Camaro with stock exhaust and yes its totally worth it, and if you do not own it you should keep your opinions to the floor if you have a opinion on it if your going to criticize cause money talks and ......... you never had it. And most of all its nice to make the car quiet especially by the cops...

WHAMMO · 02-15-2014, 07:59 PM

I think its LG motorsport that has a dyno sheet showing a big tq gain under 3500rpm, around 15tq IIRC. Its not the best spot but it does make more hp and tq. I think its pretty safe to say the it has the same 5hp gain as the Vette does. Vette marketing...

Any catback is "just noise no so much hp"... NPP is free flowing and support big hp and the sound is amazing. A must have IMO. The stock mufflers are very good but no sound and are heavy.

FB3 · 02-15-2014, 09:38 PM

I have the NPP option on my car and love it. Does it add appreciable hp? Probably not, but the sound is so good that I am not even considering any other exhaust option, other than maybe hi flow cats down the line. So unless you are planning long tube headers and complete exhaust mod, I feel that the NPP option is a great choice.

Destructo09 · 02-15-2014, 09:41 PM

Dealer told my buddy who bought a '13 that it adds about the same as a ls3 vetted.

It does sound awesome, plus the quad exhaust looks better.

tw78911sc · 02-15-2014, 10:26 PM

Quote:

Originally Posted by FB3

I have the NPP option on my car and love it. Does it add appreciable hp? Probably not, but the sound is so good that I am not even considering any other exhaust option, other than maybe hi flow cats down the line. So unless you are planning long tube headers and complete exhaust mod, I feel that the NPP option is a great choice.

JCunningham · 02-15-2014, 11:56 PM

Not going to add power. the regular cat back flows plenty up to what 600hp. The only restriction in our exhaust is the manifolds and cats.

Indydriver · 02-16-2014, 07:48 AM

Quote:

Originally Posted by christianchevell

It opens a baffle and changes the path of the exhaust for a louder sounds and more flow so yes of course it makes a little more power and Camaros were never listed as making more power with it as it was not a selling point as we are just trying to skirt the gas guzzler tax as is, and of course people will say oh its not that better.... Yah Banana Squirts I owned another 2011 Camaro with stock exhaust and yes its totally worth it, and if you do not own it you should keep your opinions to the floor if you have a opinion on it if your going to criticize cause money talks and ......... you never had it. And most of all its nice to make the car quiet especially by the cops...

How's your hangover this morning?

christianchevell · 02-16-2014, 09:32 AM

Just waiting for the haters to do their posts as they always do when it comes the subject of NPP exhaust as they do not have it so it must suck cause they spent all this money on theirs...........

Misfit · 02-16-2014, 09:47 AM

Performance gains from NPP is negligible. I wouldn't spend the $800 on the NPP package. Just get factory exhaust, then muffler delete and swap the resonator for an x-pipe

BES Stroked · 02-16-2014, 11:10 AM

Quote:

Originally Posted by Misfit

Performance gains from NPP is negligible. I wouldn't spend the $800 on the NPP package. Just get factory exhaust, then muffler delete and swap the resonator for an x-pipe

so your saying straight piped? that cant sound good...

my opinion is the NPP is awesome, love the tips, love the sound.

02-15-2014, 03:47 PM	#1
Indydriver Drives: '14 2SS/RS Vert 6M/KTU/NPP/DTA/ARH Join Date: Jan 2014 Location: Indianapolis Posts: 2,826	NPP-just noise, no additional power? I've got a 2SS/RS vert on order and based on comments I've seen here, I checked the NPP box. I notice on the new Corvette, GM claims a 5 HP increase but not on the Camaro. Is it just a sound enhancement? Will front end breathing improvements such as a CAI and TB porting give a power boost with the NPP or do you really have to go the full aftermarket headers and back approach. I do not want the full time noise of headers--I prefer stealth. I'd love to hear from those of you with NPP about HP mods you've made. Did you keep or ditch the factory upgrade exhaust you paid for in favor of a better breathing exhaust?

02-15-2014, 04:14 PM	#4
Firefighter Drives: Black '13 2SS/RS/1LE w/NPP/NAV Join Date: Oct 2012 Location: Tampa by way of Miami... Posts: 4,934	Check my build thread on my 1LE in my sig. I put down 432HP/422TQ through my NPP. Just bolt on mods. I think it's currently the last or next to last post where I describe what I have. Edit... look at post #222. __________________ My Build Thread... http://www.camaro5.com/forums/showthread.php?t=285054

02-15-2014, 05:05 PM	#5
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,587 View My Garage	It opens a baffle and changes the path of the exhaust for a louder sounds and more flow so yes of course it makes a little more power and Camaros were never listed as making more power with it as it was not a selling point as we are just trying to skirt the gas guzzler tax as is, and of course people will say oh its not that better.... Yah Banana Squirts I owned another 2011 Camaro with stock exhaust and yes its totally worth it, and if you do not own it you should keep your opinions to the floor if you have a opinion on it if your going to criticize cause money talks and ......... you never had it. And most of all its nice to make the car quiet especially by the cops... __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

02-15-2014, 07:59 PM	#6
WHAMMO Drives: 13' 1LE Join Date: Apr 2012 Location: Canada Posts: 2,640	I think its LG motorsport that has a dyno sheet showing a big tq gain under 3500rpm, around 15tq IIRC. Its not the best spot but it does make more hp and tq. I think its pretty safe to say the it has the same 5hp gain as the Vette does. Vette marketing... Any catback is "just noise no so much hp"... NPP is free flowing and support big hp and the sound is amazing. A must have IMO. The stock mufflers are very good but no sound and are heavy. __________________ 13' 1LE Old setup: TSP 231-236/Tick 660/.105 PR, UDP, SW LT 2'' & HFC, stock NPP & H pipe, VR-DRX CAI, air scoop, Goertz1 manifold, 102mm BBK, 26" Toyo DRs, Forgestars R17x10 & F18x8, rear seat delete, remote Pat G tune Autocal, 7400 limiter, Spec Mini Twin. 91oct. 11.90@122.3, 0-60ft 2.0 / 11.99@123.6, 0-60ft 2.1 DA+819 ...519RWHP SAE Solid roller SBE LS3, FED, LLSR, 91oct, 605rwhp N/A. Tuned by Pat G. Build by me. Last edited by WHAMMO; 02-15-2014 at 08:09 PM.

02-15-2014, 09:38 PM	#7
FB3 Drives: 2014 Camaro 2SS RS LS3, BRM, NPP Join Date: Apr 2010 Location: Miami, FL Posts: 411	I have the NPP option on my car and love it. Does it add appreciable hp? Probably not, but the sound is so good that I am not even considering any other exhaust option, other than maybe hi flow cats down the line. So unless you are planning long tube headers and complete exhaust mod, I feel that the NPP option is a great choice. __________________ Experience is the best teacher but the tuition is very high.

02-15-2014, 03:49 PM	#2
Camaro_Corvette 36.58625, -121.7568 Drives: Team 1LE Join Date: Mar 2008 Location: Earth Posts: 23,709 View My Garage	If I wasn't on my phone right now I would search out some threads for you. Basically, you just opened a big ole can of worms with that question. __________________ I am seriously never serious vv V vv Next order of business

02-15-2014, 04:04 PM	#3
Indydriver Drives: '14 2SS/RS Vert 6M/KTU/NPP/DTA/ARH Join Date: Jan 2014 Location: Indianapolis Posts: 2,826	Hey, I'm just lining up the mods so I can get busy when my car arrives. I read through several pages of the DIY forum and it was very helpful. I've already purchased a catch can and 1LE separator, skip shift eliminator, interior cover and gill stripes. I'm thinking the next 2 items will be TB porting and a CAI intake so I'm wondering how these front end breathing mods will work with NPP or do you really need to go headers back (which I dont really want to do) to maximize the front end mods. Just looking for information.

02-15-2014, 09:41 PM	#8
Destructo09 Drives: 2010 CGM Camaro 2SS/LS3 Join Date: Oct 2013 Location: Raleigh-Durham Posts: 1,409	Dealer told my buddy who bought a '13 that it adds about the same as a ls3 vetted. It does sound awesome, plus the quad exhaust looks better.

02-15-2014, 11:56 PM	#10
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	Not going to add power. the regular cat back flows plenty up to what 600hp. The only restriction in our exhaust is the manifolds and cats. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

02-16-2014, 09:32 AM	#12
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,587 View My Garage	Just waiting for the haters to do their posts as they always do when it comes the subject of NPP exhaust as they do not have it so it must suck cause they spent all this money on theirs........... __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

02-16-2014, 09:47 AM	#13
Misfit Jumpmaster Drives: 2014 Camaro SS LS3 Join Date: Sep 2013 Location: North Carolina Posts: 56	Performance gains from NPP is negligible. I wouldn't spend the $800 on the NPP package. Just get factory exhaust, then muffler delete and swap the resonator for an x-pipe __________________ Danny 2014 1SS Ordered 18 SEP 13 Delivered 25 OCT 13 Picked up 30 OCT 13 CAI Intake, VMAX Ported Throttle Body, Apex Motorsports Catch Can, Apex Intake Scoop/Washer Bottle Relocate, Skip Shift Eliminator, Stainless Works 2" Headers, High Flow Cats, Retro Catback Exhaust, JRE Tune...more to follow 12.6087 1/4 ET @ 113.98MPH on stock tires.