Kooks 1 7/8" installed, now have more questions - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Gonzo.ss · 02-04-2015, 09:34 AM

I finally had my headers installed catless.

Along with my other mods, it is freakin loud. I've had them on for 2 days and out of courtesy to my neighbors ( I go to the gym at 5am) I need to quiet it down a little bit.

I want to add the video but am having trouble uploading it (any suggestions)

Would adding cats back to the mix lower the sound a little bit ?

Also my butt dyno does not feel a drastic difference in power. I am having it tuned tomorrow, will that make the power more noticeable.

ST1LE · 02-04-2015, 09:48 AM

L99 or LS3?

Going with cats would have helped a bit for sure. I would suggest installing a Magnaflow Resonated X-pipe to start. They are cheap($100), and significantly reduce the volume.

I installed one for the same reason after my cam install, but sadly my particular combination produced a resonance frequency that would rattle the fillings out of your teeth, so it was promptly removed the next day. Other than that, I was VERY happy with the results and am sad it didn't work out for me.

I would not let this scare you. I am a unique case, as a guy I know has the EXACT same setup as me and he didn't get that resonance issue I did.

After that, if still too loud, then there is not a ton you can do(try adding cats). I have even researched alternative cat backs and none will really be much quieter than my NPP with the flaps closed, and with the insane price for a cat-backs, it just is not worth the money.

Good luck man!

Gonzo.ss · 02-04-2015, 10:47 AM

Sorry L99

Gonzo.ss · 02-04-2015, 10:54 AM

I'm going to order x pipe today

bkscott · 02-04-2015, 10:54 AM

I 2nd the x pipe. I had the same issue as you. Leave for work early in the morning.

Before: http://youtu.be/Mpq0NjAQSK4

After: http://youtu.be/bLo3hk5ns5g

I4toV8 · 02-04-2015, 10:57 AM

every time i see these threads, it makes me love my neighbors more. OP tell your neighbors to move, your car is more important

GMTool · 02-04-2015, 10:59 AM

Quote:

Originally Posted by Gonzo.ss

I finally had my headers installed catless.

Along with my other mods, it is freakin loud. I've had them on for 2 days and out of courtesy to my neighbors ( I go to the gym at 5am) I need to quiet it down a little bit.

I want to add the video but am having trouble uploading it (any suggestions)

Would adding cats back to the mix lower the sound a little bit ?

Also my butt dyno does not feel a drastic difference in power. I am having it tuned tomorrow, will that make the power more noticeable.

I see you have an axle back. Do you still have the stock L99 resonator on now?

Gonzo.ss · 02-04-2015, 11:23 AM

Yes , stock resonator in place

Gonzo.ss · 02-04-2015, 11:30 AM

Did not think of using youtube

Before http://youtu.be/ljGABBz2Z80

After http://youtu.be/yvhE9o72Au0

What do you guys think ?

GMTool · 02-04-2015, 11:35 AM

Well I can't imagine a magnaflow resonated x pipe is going to do much good on quieting it down on account that you still have the stock resonator. If it were me in your place I think I would get high flow cats, and put the stock mufflers back on. And get a tune as soon as you can. An L99 with headers and no tune has got to be very annoying with AFM. With a good tune you will definitely feel the increase in power especially the way the tranny will shift.

BRAVO 2SS · 02-04-2015, 11:37 AM

It sounds awesome! Have your neighbors complained? Honestly...I'd leave it. Trust me you will get used to it and will think it's quiet. Starts your car up and don't jump on it till you get out of your neighbors vicinity.

GMTool · 02-04-2015, 11:57 AM

Yes it does sound good. What I said above about putting stock mufflers back on after you already changed the diffuser is not a good idea. I was thinking of what it would take to quiet it down.

Gonzo.ss · 02-04-2015, 12:52 PM

Thanks everyone, I'm going to leave it alone for now, I have a range afm so no afm kicking in. I am getting it tuned tomorrow in the am.

I guess I was expecting a huge power difference but am guessing once it's all tuned properly I will feel it much more.

Pluto · 02-04-2015, 01:23 PM

Call me inconsiderate but I do not care what my neighbors think...I would leave it and let them get over it...I also do not purposely romp on my car in the neighborhood...not saying that you do..if I was driving normal in and out of the neighborhood I wouldn't pay any mind to anyone else

02-04-2015, 09:34 AM	#1
Gonzo.ss Drives: 2013 Camaro SS Join Date: Sep 2014 Location: Boca Raton, FL Posts: 92	Kooks 1 7/8" installed, now have more questions I finally had my headers installed catless. Along with my other mods, it is freakin loud. I've had them on for 2 days and out of courtesy to my neighbors ( I go to the gym at 5am) I need to quiet it down a little bit. I want to add the video but am having trouble uploading it (any suggestions) Would adding cats back to the mix lower the sound a little bit ? Also my butt dyno does not feel a drastic difference in power. I am having it tuned tomorrow, will that make the power more noticeable. __________________ Mods so far: Roto Fab intake. Vmaxx ported throttle body. Solo Axle back Kooks 1 7/8" LTH Catless 1LE diffuser SS Clones quad tips Apex CAI scoop Gloss black stripes, gills,bowties and bezels

02-04-2015, 09:48 AM	#2
ST1LE Drives: E92 BMW M3 Join Date: Oct 2012 Location: Houston Posts: 4,496	L99 or LS3? Going with cats would have helped a bit for sure. I would suggest installing a Magnaflow Resonated X-pipe to start. They are cheap($100), and significantly reduce the volume. I installed one for the same reason after my cam install, but sadly my particular combination produced a resonance frequency that would rattle the fillings out of your teeth, so it was promptly removed the next day. Other than that, I was VERY happy with the results and am sad it didn't work out for me. I would not let this scare you. I am a unique case, as a guy I know has the EXACT same setup as me and he didn't get that resonance issue I did. After that, if still too loud, then there is not a ton you can do(try adding cats). I have even researched alternative cat backs and none will really be much quieter than my NPP with the flaps closed, and with the insane price for a cat-backs, it just is not worth the money. Good luck man! __________________ SOLD - 2013 1LE - Pat G Spec'd Cam, NPP with 1 7/8" Long Tube Headers with High Flow Cats, Intake w/scoop, Ported Throttle Body, and Apex 1.25" Lowering Springs. J-Rod Built and Matt@FSP Tuned

02-04-2015, 10:47 AM	#3
Gonzo.ss Drives: 2013 Camaro SS Join Date: Sep 2014 Location: Boca Raton, FL Posts: 92	Sorry L99 __________________ Mods so far: Roto Fab intake. Vmaxx ported throttle body. Solo Axle back Kooks 1 7/8" LTH Catless 1LE diffuser SS Clones quad tips Apex CAI scoop Gloss black stripes, gills,bowties and bezels

02-04-2015, 10:54 AM	#4
Gonzo.ss Drives: 2013 Camaro SS Join Date: Sep 2014 Location: Boca Raton, FL Posts: 92	I'm going to order x pipe today __________________ Mods so far: Roto Fab intake. Vmaxx ported throttle body. Solo Axle back Kooks 1 7/8" LTH Catless 1LE diffuser SS Clones quad tips Apex CAI scoop Gloss black stripes, gills,bowties and bezels

02-04-2015, 10:54 AM	#5
bkscott Drives: 2010 Camaro 2SS/RS Join Date: Dec 2009 Location: Grand Prairie, Texas Posts: 1,609 View My Garage	I 2nd the x pipe. I had the same issue as you. Leave for work early in the morning. Before: http://youtu.be/Mpq0NjAQSK4 After: http://youtu.be/bLo3hk5ns5g __________________ 94 Firebird Formula (Drowned 08/30/05) 2010 IBM 2SS/RS 6M Arrived 3/25/10. ADM CAI, Borla Type S Cat Back, VMAX Ported TB, LG Short Throw Shifter, 1LE Shocks, Hotchkis Sway Bars, Whiteline Cradle Bushing Inserts, Custom Powdercoated ZL1's ,Michelin Pilot Supersports, Stainless Power Headers, Solo J Pipes, AAC LED Sidemarkers, ZL1 Rockers, SLP Splitter, ADM Stage II Cam,ZL1 Diffuser,Vitesse Throttle Controller.

02-04-2015, 10:57 AM	#6
I4toV8 Dazed & Drives: matte blue 2014 z28(186) 2015 R1 Join Date: Jun 2013 Location: The Jungle Posts: 707	every time i see these threads, it makes me love my neighbors more. OP tell your neighbors to move, your car is more important __________________

02-04-2015, 11:23 AM	#8
Gonzo.ss Drives: 2013 Camaro SS Join Date: Sep 2014 Location: Boca Raton, FL Posts: 92	Yes , stock resonator in place __________________ Mods so far: Roto Fab intake. Vmaxx ported throttle body. Solo Axle back Kooks 1 7/8" LTH Catless 1LE diffuser SS Clones quad tips Apex CAI scoop Gloss black stripes, gills,bowties and bezels

02-04-2015, 11:30 AM	#9
Gonzo.ss Drives: 2013 Camaro SS Join Date: Sep 2014 Location: Boca Raton, FL Posts: 92	Did not think of using youtube Before http://youtu.be/ljGABBz2Z80 After http://youtu.be/yvhE9o72Au0 What do you guys think ? __________________ Mods so far: Roto Fab intake. Vmaxx ported throttle body. Solo Axle back Kooks 1 7/8" LTH Catless 1LE diffuser SS Clones quad tips Apex CAI scoop Gloss black stripes, gills,bowties and bezels

02-04-2015, 11:35 AM	#10
GMTool MY SS is SOLD Drives: AGM 2012 Camaro 2SS/RS L99 Join Date: Mar 2012 Location: Southwest Illinois Posts: 1,838	Well I can't imagine a magnaflow resonated x pipe is going to do much good on quieting it down on account that you still have the stock resonator. If it were me in your place I think I would get high flow cats, and put the stock mufflers back on. And get a tune as soon as you can. An L99 with headers and no tune has got to be very annoying with AFM. With a good tune you will definitely feel the increase in power especially the way the tranny will shift. __________________ CAI, Dynatech Headers, HF Cats, JRE Tuned, Corsa Cat Back, Strut Tower Brace.

02-04-2015, 11:37 AM	#11
BRAVO 2SS Aim Small...Miss Small Drives: 2018 ZL1 M6 Join Date: Jun 2012 Location: San Jose, CA Posts: 866	It sounds awesome! Have your neighbors complained? Honestly...I'd leave it. Trust me you will get used to it and will think it's quiet. Starts your car up and don't jump on it till you get out of your neighbors vicinity. __________________ 2010 Camaro 2SS/RS

02-04-2015, 11:57 AM	#12
GMTool MY SS is SOLD Drives: AGM 2012 Camaro 2SS/RS L99 Join Date: Mar 2012 Location: Southwest Illinois Posts: 1,838	Yes it does sound good. What I said above about putting stock mufflers back on after you already changed the diffuser is not a good idea. I was thinking of what it would take to quiet it down. __________________ CAI, Dynatech Headers, HF Cats, JRE Tuned, Corsa Cat Back, Strut Tower Brace.

02-04-2015, 12:52 PM	#13
Gonzo.ss Drives: 2013 Camaro SS Join Date: Sep 2014 Location: Boca Raton, FL Posts: 92	Thanks everyone, I'm going to leave it alone for now, I have a range afm so no afm kicking in. I am getting it tuned tomorrow in the am. I guess I was expecting a huge power difference but am guessing once it's all tuned properly I will feel it much more. __________________ Mods so far: Roto Fab intake. Vmaxx ported throttle body. Solo Axle back Kooks 1 7/8" LTH Catless 1LE diffuser SS Clones quad tips Apex CAI scoop Gloss black stripes, gills,bowties and bezels

02-04-2015, 01:23 PM	#14
Pluto Drives: 2013 Camaro 2SS/RS Join Date: Jun 2013 Location: South Texas Posts: 1,198 View My Garage	Call me inconsiderate but I do not care what my neighbors think...I would leave it and let them get over it...I also do not purposely romp on my car in the neighborhood...not saying that you do..if I was driving normal in and out of the neighborhood I wouldn't pay any mind to anyone else __________________ 2013 VR Camaro 2SS/RS LS3 Small, but effective mod list: Roto-Fab Intake, TSP 2" Long tubes, TSP catless mids, MSD spark plug wires, stock catback, Elite Catch Can, APEX washer relocation and scoop, VMAX throttle body, Diablo InTune-Tuned by Matt@FSP, and a JacFab license plate bracket.