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06-16-2019, 07:18 AM
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#1 |
 
Drives: '14 2SS/RS 1LE NPP, NAV, Recaros Join Date: Apr 2014
Location: Baltimore
Posts: 83
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Exhaust Upgrades w/ NPP?
Looking to start the mod journey on my DD 1LE. Have a CAI, and looking for a bit more HP on a budget, and thought exhaust mods might be next. Not looking for obnoxious levels of noise, need to pass emissions, and I do like the NPP on my car.
Any recommendations? LT Headers, Hi-Flow Cats, X-Pipe? Thanks!
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If You're Not Having Fun, You're Not Doing It Right
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06-16-2019, 07:48 AM
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#2 |
Drives: 14 Camaro 1SS RS 1LE Summit White Join Date: Jul 2014
Location: Sunny S. Fla
Posts: 66
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Exhaust Upgrades w/ NPP?
I would leave the NPP. Do the LT's and X-pipe.
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2014 1SS/RS 1LE, Summit White
2000 Trans Am 2004 LWB Chevy 2500 Van |
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06-16-2019, 08:14 AM
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#3 |
       
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Go Long tube headers w/ cat deletes and a remote tune would work great for you. I had my 1LE with this exhaust setup w/ NPP for 3 years. Excellent set up.
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Car mods: never enough!
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06-16-2019, 08:25 AM
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#4 |
 
Drives: 13 IOM 2ss RS manual Join Date: Jun 2018
Location: Euless,TX
Posts: 213
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I put on LT’s and 3”, no cats, X pipe, all from LG motorsports, I connected to my factory NPP mufflers. I still have the fuse in, so the NPP is still active and functional. The sound is exactly what I was looking for, slightly deeper under normal driving, then when I go WOT it gets aggressive and considerably louder.
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Rectangular Dollars will beat Cubic Inches
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06-16-2019, 08:29 AM
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#5 |
   
Drives: 2010 2SS/RS Join Date: Dec 2009
Location: Clarksville Tennesse.
Posts: 6,064
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He has to pass emissions so cats are a requirement.
I have long tubes with a 2 3/4 Z28 system they don't have resonators in them with a X Pipe from a C7 corvette (corvette forum about 50 bucks and it looks factory). High flow cats and the NPP on my 2010 SS sounds amazing. Also have the Z28 CAI. PM me your number an Ill send you a sound clip from NCM.
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Orange Krush II
1LE Front sway bar, Splitter, shocks and struts, Z28 dual mode mufflers, Intake, UCA Bushings, and Toresen 3.91 Diff. 1 piece DSS Drive Shaft, ZL1/C7 Calipers, and 32mm JPSS Rear Bar. ASC race spec splitter and wicker. 6th Gen M017 Wheels. Stainless Works 1 7/8 LTs. DSE and PAFDT Suspension components. |
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06-16-2019, 08:38 AM
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#6 | |
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Quote:
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Car mods: never enough!
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06-16-2019, 09:15 AM
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#7 |
Drives: '14 BRM 1LE 2SS/RS Join Date: Nov 2017
Location: Ft. Wayne, IN
Posts: 801
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Another vote for LT's and a tune. RDP has a great deal on both as a package with lifetime tunes. You can expect at least a 50+ rwhp gain from those mods (including your CAI).
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592 HP/590 TQ
LSA Blower w/ 2.45 Griptec, Reinforced Brick, FIC 1000 injectors, JRE FPCM, LFP Dual Pass HX, ZL1 IC pump, RotoFab CAI, Bo White TB, Coated Stainless Power 1-7/8" LTs, NPP, NGK TR7IX, Mighty Mouse Wild CC, AEM X-Series WB, Aeroforce Interceptor, MGW Shifter, Z28 Grill, Gary's Custom ZL1 Rockers, Hero Tails, Tuned by IMC |
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06-16-2019, 09:22 AM
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#8 | |
Drives: 2014 2SS/RS Join Date: Jan 2018
Location: Washington
Posts: 848
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Quote:
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2014 2SS/RS LS3/M6
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06-16-2019, 10:01 AM
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#9 | |
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Drives: 2015 Camaro 2SS/RS Join Date: Jan 2007
Location: Philadelphia
Posts: 78
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Quote:
Kooks LT’s with catted connection pipes Cut H pipe out and add X pipe https://www.amazon.com/Exhaust-Diame...s%2C152&sr=8-3
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2015 2SS/RS 6spd
Rotofab CAI,MGW Shifter, DSP Tune Kooks LT/HFC/Xpipe/NPP Mufflers 4:10's, Trutrac Solid Cradle Bushings, BMR Toe and Trailing arms |
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06-16-2019, 10:50 AM
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#10 |
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Started#gottalovethatblue
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Keep the NPP and get some long tube headers with high flow cats and a quality tune. You should pass inspections no problems and you'll love your new found sound and power.
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06-16-2019, 01:30 PM
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#11 |
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Drives: 14 Camaro 1SS RS 1LE Summit White Join Date: Jul 2014
Location: Sunny S. Fla
Posts: 66
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Whatever you decide to do. I'd get a tune to optimize the combination. Even if it means buying cheaper headers. I have Speed Engineering on mine and had them on the car for about 85k miles. They owe me nothing at this point. No leaks, no retighting, no gasket blowouts. I'm at 3 cams and 2 set of heads at 119k and the headers were the most cost effective mod I made.
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2014 1SS/RS 1LE, Summit White
2000 Trans Am 2004 LWB Chevy 2500 Van |
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06-16-2019, 01:44 PM
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#12 |
Drives: 2015 1LE Join Date: Oct 2015
Location: Cleveland, OH
Posts: 1,485
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Headers with NPP is perfect sound level. Comfortable when cruising and loud when you punch it.
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2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ
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06-16-2019, 02:47 PM
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#13 |
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Drives: 2011 2SS/RS Join Date: Feb 2016
Location: Jacksonville FL
Posts: 1,190
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Longtubes, xpipe, NPP. Fantastic with stock internals ora cam. Makes me wonder why people delete it.
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•2011 Camaro SS 2SS/RS A6
•MRR M017 1le Replica Wheels •Vararam Ram Air Intake •Speed Engineering Longtube Headers w/ Magnaflow HF Cats •Bo White PnP Stage 2 TB •GPI SS2 VVT Cam w Cometic thin gaskets 10.69 compression •Xpipe w/ Res Delete and NPP Exhaust •Tuned By Anonymous Calibrations •Gen5DIY Mylink Conversion W/ Backup Cam •Morel 3 way custom speakers, Infinity 860w Subwoofers in trunk baffle •Helix P6 6ch amp w/ 8ch DSP and P1 Sub amp |
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06-16-2019, 09:03 PM
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#14 | |
 
Drives: 2014 1SS/RS, LS3, NPP Join Date: Feb 2019
Location: Florida
Posts: 184
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Quote:
Your response above is kind of what I was thinking for my eventual exhaust mods: LTs, high flow cats, NPP, and a tune with a DIY 3 way switch for ultimate control. (No emissions testing in FL but don’t want the strange smell from cat delete.) |
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