12-12-2022, 12:08 PM | #1 |
NPP Smashed Pipe question
A local performance shop said they recently replaced the smashed pipe with a round one...said it was some kit a customer brought in. Had to cut out smashed pipe and weld in round one and it did not cause any issues. They did not know if it made any sound difference because customer also added headers.
Has anyone done anything like this? Any difference? Any reason to do this or not? Thinking about going to 1 7/8 headers and leave stock NPP but wondering if I should replace the smashed pipe to get more sound???
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2018 ZLE - M6, Nightfall Gray
GM previously owned: 2014 SS M6 2014 ZL1 M6 2019 ZL1 M6 2016 Z06 M6 |
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12-12-2022, 12:15 PM | #2 |
Drives: 2016 1ss camaro Join Date: Feb 2016
Location: 909
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it doesnt do anything dont waste your time or money some people have done it oh well
https://www.camaro6.com/forums/showt...t=CRUSHED+PIPE
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16 1SS NIGHTFALL GRAY METALLIC WITH NPP #BECAUSERACECAR #SAVETHEMANUALS
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12-12-2022, 12:20 PM | #3 |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 11,701
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Those crushed pipe sections aren't a restriction up to a very high power level, which has been proven over and over again.
The one removal scenario that might help in any way (apart from esthetics of course) is if you get longtube headers and want to install a resonator in place of the crushed pipe sections to quiet the car down at WOT and make cold starts less earth shattering, maybe even take the edge of the rasp off a bit. I kept the stock NPP muffler, too, and I see how someone may want that.
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
12-12-2022, 12:27 PM | #4 | |
Drives: '20 ZLE Join Date: Jun 2020
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Quote:
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'20 ZL1 1LE A10.
LME 390, E2650, FBO, 100 oct. Not a DD. |
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12-12-2022, 01:39 PM | #5 | |
Drives: Chevrolet Camaro ZL1 Join Date: May 2022
Location: Concordia
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Quote:
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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ |
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12-12-2022, 03:27 PM | #6 |
Drives: 22 ZL1, 18 RS3, 22 M3P Join Date: Oct 2016
Location: Walnut Creek, CA
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I was thinking of having the muffler shop cut out that part and replace with new round piping when I have my axle-back installed.
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2022 ZL1 - M6, Wrapped, Tinted, Rotofab intake, MBRP AxleBack, Lots of BMR rear suspension components
2022 Tesla Model 3 Performance 2018 Audi RS3 - Many mods & e85 Instagram - @JBsCars |
12-12-2022, 04:07 PM | #7 | |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 11,701
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Quote:
https://www.summitracing.com/parts/VPE-1142
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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12-13-2022, 01:49 PM | #8 | |
Drives: Chevrolet Camaro ZL1 Join Date: May 2022
Location: Concordia
Posts: 449
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Quote:
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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ |
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12-13-2022, 05:02 PM | #9 |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,614
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Hooker will sell you a set of these prefab'd straight pipes/crimp deletes for like $150
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'20 ZL1 1LE A10.
LME 390, E2650, FBO, 100 oct. Not a DD. |
12-13-2022, 05:44 PM | #10 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
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Or just replace the x-pipe with an aftermarket x-pipe that connects to the stock suitcase muffler. They don’t have the crimped sections and you just cut the crimped ends out and attach it to the stock muffler.
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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12-13-2022, 07:37 PM | #11 | |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 11,701
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Quote:
I'll have to find another part then, though it isn't urgent or pressing, I'm mostly fine with the exhaust as-is.
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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12-14-2022, 11:15 AM | #12 | |
Drives: Chevrolet Camaro ZL1 Join Date: May 2022
Location: Concordia
Posts: 449
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Quote:
__________________
2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ |
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