Long tube headers with Borla Stype

Zigg L1 · 09-01-2019, 08:20 PM

I just recently added Kooks headers with cats to my exhaust and it is super loud.. Nascar loud in my opinion. I also lost that deep rumble of the Stype catback. Looking for some advice. I was thinking about adding a resonator or the flow master muffler xpipe or MBRP makes a bullets muffler I am not looking to take all the loudness just deepen the tone. Anyone out there feel the same or am I the odd ball and should enjoy the bald eagles flying when I smash the gas

Indyblue98 · 09-01-2019, 08:27 PM

On my 2012 I have Long Headers no cats and Corsa Mufflers .
It was Raspy

Was able to tone it down a bit with a Resonated X pipe .
Didn't change the volume much , but took the rasp out.

Jimabe · 09-01-2019, 08:35 PM

I am in similar boat. Long tubes but no cats. Absolutely hated that thru the stock suitcase so quickly got Cora axle back. Still raspy and loud as hell. Will be doing resonators to tone down. Having trouble w second round of motor mods so haven’t gone after it yet...
So u not alone...this is raspy as hell!

Zigg L1 · 09-01-2019, 10:58 PM

Ok good so I am not the only one who feels this way. What resonator x pipe did you use? Not that many choices out there only thing that I could find was the magnaflow. My issue is more of a tone then sound level.

JonDaddy82 · 09-01-2019, 11:25 PM

Use the Borla 60608 if you already have the Borla catback.

Zigg L1 · 09-02-2019, 09:13 AM

Quote:

Originally Posted by JonDaddy82

Use the Borla 60608 if you already have the Borla catback.

That's what I thought too but the Borla 60608 is 2.75in and the zl1 Borla catback is 3in. I also called Borla and they said it would not work. Unless you know of someone using that with the zl1 catback. The person on the phone from Borla pretty much shot.me down and said tonfigure it out but Borla doesn't offer anything like that for the 2018 Zl1. I wanted to keep it all Borla

JonDaddy82 · 09-02-2019, 09:32 AM

Ahh Borla is correct, sorry didn't know you had the ZL1 specific part number catback.

TMS · 09-02-2019, 11:05 AM

I have the ZL1 specific S-Type cat back (3”). I later did the full cat delete and it was way too loud. I too looked at Borla resonators but ran into the same problem. I ultimately picked up a pair of Vibrant 3” x 12” bottle resonators (#1794) and welded them in.

They quieted it down for sure but not near as much as I would have liked. If I had a do over I would have gone with the 18” version.

JonDaddy82 · 09-02-2019, 12:45 PM

Who's cat deletes do you have?

TMS · 09-02-2019, 01:20 PM

NEP

JonDaddy82 · 09-02-2019, 01:41 PM

How are you liking those vs. going LT headers?

TMS · 09-02-2019, 02:49 PM

Quote:

Originally Posted by JonDaddy82

How are you liking those vs. going LT headers?

I like them quite a bit. Being a California car and dealing with visual inspections for emissions to pass, I didn’t want the headache of having to swap back to stock exhaust manifolds from the LTs. So I ported my stock manifolds and the NEP pipe inlets to open them up a bit to help with flow. Gained about 3/8” in diameter.

Here are the manifolds:

And the NEP cat delete pipes:

Zigg L1 · 09-02-2019, 07:01 PM

Surfing the web I did run across those vibrant bottles and also the MBRP. Magnaflow makes one too. I think I will have also go with that option.
Did the vibrant bottles take away some of the rasp too?

TMS · 09-02-2019, 09:21 PM

Quote:

Originally Posted by Zigg L1

Surfing the web I did run across those vibrant bottles and also the MBRP. Magnaflow makes one too. I think I will have also go with that option.

Did the vibrant bottles take away some of the rasp too?

I didn’t really have much rasp to begin with. Maybe because I wasn’t running LT headers? Loudness was my primary issue.

09-01-2019, 08:27 PM	#2
Indyblue98 2012 RS 2ss Drives: 2018 ZL1 2012 2SS WhippleCharged Join Date: Feb 2012 Location: Kansas Posts: 414	On my 2012 I have Long Headers no cats and Corsa Mufflers . It was Raspy Was able to tone it down a bit with a Resonated X pipe . Didn't change the volume much , but took the rasp out. __________________ 2018 ZL1 A10 and 2012 2SS RS Whipple-Corsa-RotoFab-ZL1 Diff 3.73 Pfadt ZL Stage 3 Suspension+

09-01-2019, 08:35 PM	#3
Jimabe Drives: 2018 Red ZL1 Join Date: Mar 2018 Location: Spring grove IL Posts: 190	I am in similar boat. Long tubes but no cats. Absolutely hated that thru the stock suitcase so quickly got Cora axle back. Still raspy and loud as hell. Will be doing resonators to tone down. Having trouble w second round of motor mods so haven’t gone after it yet... So u not alone...this is raspy as hell! __________________ Mods: RotoFab Big Gulp, 2" Kooks, Metco 9.1" pulley, Green belt, 103 NW TB, Tune, WeapX Boost Chiller, ADM Coolant reservoir, Jokerz Full Tilt SC Port, Elite E2X Can, Corsa Sport Catback, LED markers, 1LE Tail lights, HO reverse LED's, Red SC Lid, Forgestar 17x11/MickeyT Street R's for Drags

09-01-2019, 11:25 PM	#5
JonDaddy82 Drives: 2018 ZL1 Coupe NFG M6 Join Date: May 2017 Location: Nolensville, TN Posts: 618	Use the Borla 60608 if you already have the Borla catback. __________________ 1989 Forumla 350 WS6 <- High School 2000 Trans Am Firehawk <- After High School 2017 Colorado Z71 <- Daily 2018 ZL1 M6 <- Not Daily

09-02-2019, 09:32 AM	#7
JonDaddy82 Drives: 2018 ZL1 Coupe NFG M6 Join Date: May 2017 Location: Nolensville, TN Posts: 618	Ahh Borla is correct, sorry didn't know you had the ZL1 specific part number catback. __________________ 1989 Forumla 350 WS6 <- High School 2000 Trans Am Firehawk <- After High School 2017 Colorado Z71 <- Daily 2018 ZL1 M6 <- Not Daily

09-02-2019, 11:05 AM	#8
TMS Drives: 2018 ZL1 1LE - HBM, PDR Join Date: Jun 2017 Location: Rescue, CA Posts: 324	I have the ZL1 specific S-Type cat back (3”). I later did the full cat delete and it was way too loud. I too looked at Borla resonators but ran into the same problem. I ultimately picked up a pair of Vibrant 3” x 12” bottle resonators (#1794) and welded them in. They quieted it down for sure but not near as much as I would have liked. If I had a do over I would have gone with the 18” version. __________________ JRE Tuned (HPTuners) \| 15% OD (9.17" crank pulley) \| TVS2300 Maggie Heartbeat Supercharger - 14 psi \| E-50 (DSX Flex Fuel kit) \| JMS FuelMax Fuel Pump Booster \| LPE Big Bore High Volume DI fuel pump \| LPE High Flow DI fuel injectors \| LT5 95mm TB \| RotoFab CAI \| AEM X-Series OBD2 wide band gauge \| Elite Engineering E2-X catch can \| Borla S-type NPP Cat-Back 3" exhaust \| Forgeline GTD1 5-lug Satin Graphite \| SunTek wrap \| C-Quartz Finest Reserve ceramic coated

09-01-2019, 08:20 PM	#1
Zigg L1 Drives: 2018 ZL1 Garnet Red Tintcoat A10 Join Date: Jan 2019 Location: NY Posts: 537	Long tube headers with Borla Stype I just recently added Kooks headers with cats to my exhaust and it is super loud.. Nascar loud in my opinion. I also lost that deep rumble of the Stype catback. Looking for some advice. I was thinking about adding a resonator or the flow master muffler xpipe or MBRP makes a bullets muffler I am not looking to take all the loudness just deepen the tone. Anyone out there feel the same or am I the odd ball and should enjoy the bald eagles flying when I smash the gas

09-01-2019, 10:58 PM	#4
Zigg L1 Drives: 2018 ZL1 Garnet Red Tintcoat A10 Join Date: Jan 2019 Location: NY Posts: 537	Ok good so I am not the only one who feels this way. What resonator x pipe did you use? Not that many choices out there only thing that I could find was the magnaflow. My issue is more of a tone then sound level.

09-02-2019, 12:45 PM	#9
JonDaddy82 Drives: 2018 ZL1 Coupe NFG M6 Join Date: May 2017 Location: Nolensville, TN Posts: 618	Who's cat deletes do you have? __________________ 1989 Forumla 350 WS6 <- High School 2000 Trans Am Firehawk <- After High School 2017 Colorado Z71 <- Daily 2018 ZL1 M6 <- Not Daily

09-02-2019, 01:20 PM	#10
TMS Drives: 2018 ZL1 1LE - HBM, PDR Join Date: Jun 2017 Location: Rescue, CA Posts: 324	NEP __________________ JRE Tuned (HPTuners) \| 15% OD (9.17" crank pulley) \| TVS2300 Maggie Heartbeat Supercharger - 14 psi \| E-50 (DSX Flex Fuel kit) \| JMS FuelMax Fuel Pump Booster \| LPE Big Bore High Volume DI fuel pump \| LPE High Flow DI fuel injectors \| LT5 95mm TB \| RotoFab CAI \| AEM X-Series OBD2 wide band gauge \| Elite Engineering E2-X catch can \| Borla S-type NPP Cat-Back 3" exhaust \| Forgeline GTD1 5-lug Satin Graphite \| SunTek wrap \| C-Quartz Finest Reserve ceramic coated

09-02-2019, 01:41 PM	#11
JonDaddy82 Drives: 2018 ZL1 Coupe NFG M6 Join Date: May 2017 Location: Nolensville, TN Posts: 618	How are you liking those vs. going LT headers? __________________ 1989 Forumla 350 WS6 <- High School 2000 Trans Am Firehawk <- After High School 2017 Colorado Z71 <- Daily 2018 ZL1 M6 <- Not Daily

09-02-2019, 07:01 PM	#13
Zigg L1 Drives: 2018 ZL1 Garnet Red Tintcoat A10 Join Date: Jan 2019 Location: NY Posts: 537	Surfing the web I did run across those vibrant bottles and also the MBRP. Magnaflow makes one too. I think I will have also go with that option. Did the vibrant bottles take away some of the rasp too?

User Name		Remember Me?
Password