Installed Speed Engineering Headers - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

WooPigSS · 01-20-2021, 10:48 AM

Hey guys,

New to posting in the forum, been a long time researcher on here. I have owned my 2013 AGM 2SS/RS L99 for 4 years and I am finally getting around to doing some performance mods.

I first installed a CAI cold air intake and then a Lingenfelter/Corsa branded axle back. I thought these would be decently loud, since they are pretty small, but they weren't loud enough for me. So I decided to buy the speed engineering 1 7/8" headers with no cats.

On to the install... It wasn't too bad but it seemed I had all the small problems that everyone had mentioned. The problems I had were: the O2 sensor plugs were tough to get unplugged, the O2 sensors themselves were stuck pretty good, I also had to dimple the passenger side near the crossmember and frame. The clamps are crap like everyone says... I ordered some 3" band clamps from Jegs but they didn't fit over the connection pipe. Which clamps do yall recommend for this setup? I still highly recommend these headers for anyone on a tight budget and not using cats!

Now for the results... Sounds great on start up and idle! However, I was a little disappointed when I was driving around town. Seems awfully quiet for having headers, no cats, and small mufflers. I am thinking maybe the L99 resonator is to blame... How much sound volume is the stock resonator holding back?

Thanks for the advice in advance and I look forward to being a member of this forum!

RupertPupkin · 01-20-2021, 11:30 AM

https://www.camaro5.com/forums/showthread.php?t=75846

The resonators will change the sound a little bit. If you’re looking for a louder setup, add a cam and just run open headers.

Avenging Orange · 01-20-2021, 12:07 PM

Yes, remove that tubby resonator....big difference. Then get a proper tune.

Good luck.

Alex_Bumblebee · 01-20-2021, 12:56 PM

When I installed mine I had the problem of there are two O2 sensors but only one ports to plug them into. So I just left the other 2 front O2 sensors just hanging i don't know if that was a bad move or not.

Tarendor · 01-20-2021, 12:58 PM

The giant suit case makes a very noticeable sound difference. When I changed mine out for an x pipe I ended up removing the j pipes and putting in flow mater 10's to quite it down lol.

WooPigSS · 01-20-2021, 01:37 PM

Quote:

Originally Posted by RupertPupkin

https://www.camaro5.com/forums/showthread.php?t=75846

The resonators will change the sound a little bit. If you’re looking for a louder setup, add a cam and just run open headers.

Hopefully in the near future I'll get a GPI SS3 cam and some ported heads. I loved the sound of the open headers but unfortunately the vibrating of the whole interior wasn't too much fun lol.

WooPigSS · 01-20-2021, 01:39 PM

Quote:

Originally Posted by Avenging Orange

Yes, remove that tubby resonator....big difference. Then get a proper tune.

Good luck.

Sound's like I'll head to the muffler shop and get it replaced with an x-pipe! Excited to get my car to Ryan at GPI to get it tuned and running good!

1JEWLDSSRS · 01-20-2021, 01:47 PM

Yes sir, get rid of that giant washtub in the middle and install a magnaflow Tru-flow X pipe and you will notice a world of sound difference!! I got mine from Summitt

https://www.autoanything.com/exhaust...80977764277962

RupertPupkin · 01-20-2021, 02:33 PM

Quote:

Originally Posted by WooPigSS

Hopefully in the near future I'll get a GPI SS3 cam and some ported heads. I loved the sound of the open headers but unfortunately the vibrating of the whole interior wasn't too much fun lol.

Yeah.. when my catback got caught on a speed bump, running open headers sucked. Sounded killer though.

Ashen L99 · 01-21-2021, 01:51 AM

Stock L99 catback belongs in the trash, the resonator is a suitcase and the mufflers are heavy as well. Those mufflers won’t do much after getting rid of the stock resonator, you might go back the other way.

01-20-2021, 10:48 AM	#1
WooPigSS Drives: 2013 Ashen Grey Metallic 2SS Join Date: Sep 2016 Location: Arkansas Posts: 4	Installed Speed Engineering Headers Hey guys, New to posting in the forum, been a long time researcher on here. I have owned my 2013 AGM 2SS/RS L99 for 4 years and I am finally getting around to doing some performance mods. I first installed a CAI cold air intake and then a Lingenfelter/Corsa branded axle back. I thought these would be decently loud, since they are pretty small, but they weren't loud enough for me. So I decided to buy the speed engineering 1 7/8" headers with no cats. On to the install... It wasn't too bad but it seemed I had all the small problems that everyone had mentioned. The problems I had were: the O2 sensor plugs were tough to get unplugged, the O2 sensors themselves were stuck pretty good, I also had to dimple the passenger side near the crossmember and frame. The clamps are crap like everyone says... I ordered some 3" band clamps from Jegs but they didn't fit over the connection pipe. Which clamps do yall recommend for this setup? I still highly recommend these headers for anyone on a tight budget and not using cats! Now for the results... Sounds great on start up and idle! However, I was a little disappointed when I was driving around town. Seems awfully quiet for having headers, no cats, and small mufflers. I am thinking maybe the L99 resonator is to blame... How much sound volume is the stock resonator holding back? Thanks for the advice in advance and I look forward to being a member of this forum!

01-20-2021, 11:30 AM	#2
RupertPupkin Drives: 2014 Camaro SS 1Le Join Date: Feb 2016 Location: IL Posts: 1,586	https://www.camaro5.com/forums/showthread.php?t=75846 The resonators will change the sound a little bit. If you’re looking for a louder setup, add a cam and just run open headers. __________________ 2014 SS 1LE Money Pit/ Forged 402 CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq

01-20-2021, 12:07 PM	#3
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,297	Yes, remove that tubby resonator....big difference. Then get a proper tune. Good luck. __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!!

01-20-2021, 12:56 PM	#4
Alex_Bumblebee Drives: Chevrolet Camaro Join Date: Jan 2021 Location: Los Angeles Posts: 41 View My Garage	Speedengineering Headers When I installed mine I had the problem of there are two O2 sensors but only one ports to plug them into. So I just left the other 2 front O2 sensors just hanging i don't know if that was a bad move or not.

01-20-2021, 12:58 PM	#5
Tarendor Drives: 2012 camaro 2ss rs L99 Join Date: Feb 2017 Location: North Sioux city SD Posts: 446 View My Garage	The giant suit case makes a very noticeable sound difference. When I changed mine out for an x pipe I ended up removing the j pipes and putting in flow mater 10's to quite it down lol. __________________ 2012 2SS/RS, L99, no cats/mufflers, Ported intake manifold, fuel rail upgrade, ID1050x injectors, Vmax throttle body, 25% UDP, GPI DOD delete, GPI SS3, GPI cnc heads, GPI – 5/16″ Hardened Pushrods, BTR trunion upgrade, BTR .660 springs, pcv revamp w/dual catch cans, Circle D 3800, full BMR suspension & bushings. ZL1 fuel pump, HPT programmed fpcm. JMS bap, Snow VC-50 methanol setup. custom 4gal methonal tank, vs7875 turbo, FMIC, precision 46mm WG, 50mm BOV, 3bar map, SJM line lock, Innovate SCG-1, Hurst shifter with tap shift mod, ×2 Holley 14" fans Diy E85, Diy auxiliary pump

01-20-2021, 01:47 PM	#8
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,426	Yes sir, get rid of that giant washtub in the middle and install a magnaflow Tru-flow X pipe and you will notice a world of sound difference!! I got mine from Summitt https://www.autoanything.com/exhaust...80977764277962 __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.

01-21-2021, 01:51 AM	#10
Ashen L99 Drives: Ashen grey, 1SS, L99 Join Date: Aug 2016 Location: Oklahoma Posts: 526	Stock L99 catback belongs in the trash, the resonator is a suitcase and the mufflers are heavy as well. Those mufflers won’t do much after getting rid of the stock resonator, you might go back the other way. __________________ Roto-fab CAI, Nick Williams 102mm TB, LOD X1 V3 intake manifold, GMPP LS3 heads, Night Fury cam, TSP 2” long tubes, Corsa ZL-1 catback, Nitrous Outlet 102mm plate kit/150 shot, NGK BR7EF plugs with Taylor plug wires, DSX flex fuel kit, ZL-1 fuel pump and injectors, B&M deep trans pan, Yank 3400 converter, 3.45s with BMR Delrin bushings, mishimoto 169° Thermostat, GM ground effects, T-Rex upper grill, Z/28 Spoiler, Lolly pop Lime brake calipers, ZL1 10 spoke wheels, 12” subwoofer, and custom paint matched interior.