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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 06-24-2013, 10:29 PM   #1
trw427ss @ Futral

 
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Thumbs up L99 Exhaust Versus ZL1 NPP Exhaust with LT's

I swapped the factory L99 exhaust out for a factory ZL1 NPP exhaust on my car. Dynoed before and after a couple of hours apart. The factory L99 exhaust is not to bad, the ZL1 NPP exhaust made 4rwtq and 2rwhp at peak and 4-5rwhp through the middle over the L99 Exhaust! It has a deeper tone at idle than the L99 and is not as raspy at wide open throttle. Also I have 1 7/8's Stainless Power headers and no cats with both combo's.
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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 06-24-2013, 10:37 PM   #2
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You got it from GMPP?
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Old 06-24-2013, 10:38 PM   #3
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You got it from GMPP?
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Old 06-24-2013, 10:40 PM   #4
trw427ss @ Futral

 
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Quote:
Originally Posted by CamaroSS408 View Post
You got it from GMPP?
No, got it off a ZL1.
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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 06-24-2013, 10:43 PM   #5
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I was thinking of getting this exhaust. suggestion?
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Old 06-24-2013, 10:54 PM   #6
trw427ss @ Futral

 
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Originally Posted by CamaroSS408 View Post
I was thinking of getting this exhaust. suggestion?
I like it and I can run it open or closed with the flip of a switch!
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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 06-24-2013, 11:04 PM   #7
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cut outs too?
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Old 06-24-2013, 11:12 PM   #8
trw427ss @ Futral

 
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cut outs too?
NPP exhaust has a vacuum control cut out built into the muffler ( duel mode exhaust). ZL1's and 1LE cars have this.
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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 06-25-2013, 06:33 AM   #9
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This exhaust is an option one all manual SS's starting with 2013 models.
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Old 06-25-2013, 09:01 AM   #10
trw427ss @ Futral

 
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Quote:
Originally Posted by ST1LE View Post
This exhaust is an option one all manual SS's starting with 2013 models.
And standard on 2012 and up ZL1's.
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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 06-25-2013, 09:13 AM   #11
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yup love mine will never change it out.
sounds and performs flat NASTY with LTs and a cam. and M2W rocks.
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Old 06-25-2013, 09:28 AM   #12
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Are they 2.5" or full 3" ?
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Old 06-25-2013, 02:32 PM   #13
trw427ss @ Futral

 
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Are they 2.5" or full 3" ?
They are all 2.5" (ZL1 and 1LE).
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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 06-26-2013, 03:06 PM   #14
trw427ss @ Futral

 
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Well so much for the 6rwhp everyone claims that NPP exhaust is worth! But it was worth it for the sound!
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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 06-26-2013, 04:51 PM   #15
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Sound is good, must sound pretty mean without cats.
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PROJECT HEAVY CHEVY: 2010 Camaro SS/RS |1SS | L99 | CGM
13.15@106 1.95 | 100% Stock
12.06@113 1.70 | Bolt-Ons | Stock 3.27s
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Old 07-01-2013, 02:02 PM   #16
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Will the ZL1 NPP work on a 2010 SS L99 without modifying the pipes? I know I will need to add the vacuum system, diffuser, and such. I found a good deal on the NPP pulled from a 2013 ZL1, I just don't want to pull the trigger unless I know it will pop right in.
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Old 07-01-2013, 02:07 PM   #17
trw427ss @ Futral

 
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Quote:
Originally Posted by FanDamNCSU View Post
Will the ZL1 NPP work on a 2010 SS L99 without modifying the pipes? I know I will need to add the vacuum system, diffuser, and such. I found a good deal on the NPP pulled from a 2013 ZL1, I just don't want to pull the trigger unless I know it will pop right in.
Yes it will go right in your 2010. You can get the diffuser for less than $100.00
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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 07-01-2013, 02:22 PM   #18
trw427ss @ Futral

 
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Here's my L99 with Stainless Power LT's no cats and ZL1 NPP Exhaust with Mild to Wild switch.

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2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock
12.46@111.19mph with New Era CAI & U/D Pulley
12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's!
12.007@ 115.20 With 18" Drag Radials-11.76 @116.59 With Yank SS3200 Converter
11.44 @118.75 Bolt-no Record-After H/C 10.93 @126.86
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Old 07-01-2013, 02:44 PM   #19
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Sweet! Ordered mine!
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Performance:
Vararam CAI, Vmax Ported Throttle Body, GM Performance Dual Mode Exhaust (NPP), JRE Tune, Hotchkis TVS Stage 2 Track Pack
Functional:
Hex Vents, Elite Catch Can, WeatherTech Digital Fit Mats, Escort Passport Max
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Old 07-01-2013, 03:24 PM   #20
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Sounds great. I bought a set out of the vendor FS section here and am going to run it with LG headers and no cats. nice to get an idea of what it will sound like
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Old 12-12-2013, 11:33 PM   #21
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Quote:
Originally Posted by trw427ss View Post
Here's my L99 with Stainless Power LT's no cats and ZL1 NPP Exhaust with Mild to Wild switch.


Nice sound, it is nice to hear what it sounds like with the cats removed..
thanks!

ill be adding LT's and off road pipe/ no cats pretty soon.

when you get on the throttle its it music to ur ears lol, or is it too loud?
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