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12-29-2019, 11:27 AM
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#1 |
 Drives: 2015 ZL1 Join Date: May 2015
Location: wisconsin
Posts: 139
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2" headers??
just wondering what is the power output needed before 2" headers make a difference? i know there are alot of #s tunners throw out there not sure what to make of it, ive seen 500RWHP to 900RWHP????
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12-29-2019, 12:33 PM
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#2 |
  
Drives: 2014 Camaro SS/RS 1LE 1967 Camaro Join Date: Oct 2013
Location: Fort Wayne, IN
Posts: 874
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From what some of the top shops on here say, 1 7/8 are good to 650 rwhp . After that the 2” primaries will benefit you more.
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12-29-2019, 02:18 PM
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#3 |
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USA-1
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So, Bo White has said that he gained 18rwhp when he went from a 2.5 - 3" exhaust setup and that he was at around 600 rwhp. He also said that any car with a power adder can benefit from the 2" headers, so take that for what you will...
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"A Camaro in the garage is safe, but that's not what Camaros are built for..."
R2C CAI / Apex Scoop / VMAX Ported TB / Speed Engineering LTHs / X-pipe / GPI port/rod-mod intake manifold / Circle D 3200 278mm Converter / 3.91 gears / DynoSteve tuned / 1LE Shocks/Struts/Toe Links / ZL1 Rear Sway Bar / Z/28 Trailing arms / Prothane Radius Arm & Subframe Bushings / BMR UCA Bracket, Steering rack bushing / B&M Tranny Cooler / RX Catch Can / Jannetty Tranny Dipstick / 2012+ Heater Hose / 2013+ Rearview Mirror / Fuel rail flip / Drake shifter / Oil Cooler Delete |
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12-29-2019, 06:44 PM
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#4 |
   
Drives: Never just fly under the radar Join Date: Jul 2015
Location: Kansas
Posts: 1,531
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I have 2" headers into 3" catless exhaust. Not sure if I'm gaining much over the 1 7/8" headers or need them around 500rwhp. In my bias opinion the sound is better with the 2" though.
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1-8-4-3-6-5-7-2
Old Skool |
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12-29-2019, 08:28 PM
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#5 | |
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Drives: Chevrolet camaro zl1 Join Date: May 2019
Location: Tajas
Posts: 104
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Quote:
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2014 Sliver ZL1. Built engine, Stage 1 Frankenstein heads, Magnuson, SW long tubes, AFCO H/E, She Gone cam, flex fuel sensor, meth injection. 820rwhp e85.
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12-30-2019, 08:28 AM
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#6 |
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fo'shizZL1
Drives: 2017 ZL1 Join Date: Aug 2017
Location: ATL
Posts: 1,281
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I remember someone did a test and picked up 25 or 30hp going from 1-7/8" to 2" at the 850-ish rwhp level.
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2017 ZL1 M6 Black | Maggie 2650 // 103TB // Big Gulp
Past Rides- 2014 ZL1 M6 Red Hot | Tons of mods 2004 CTS-V M6 Silver | Many mods 1995 Corvette M6 Torch Red | A few more mods 1992 Camaro M5 White | A few mods |
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12-30-2019, 10:28 AM
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#7 |
 
Drives: 2013 ZL1 Join Date: Dec 2015
Location: Gulfport, MS
Posts: 250
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If you make the jump to 2” do you need to get another tune?
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12-30-2019, 12:55 PM
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#8 |
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USA-1
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Sorry to summon Bo White again...but...I asked that exact question and he said it was advised.
__________________
"A Camaro in the garage is safe, but that's not what Camaros are built for..."
R2C CAI / Apex Scoop / VMAX Ported TB / Speed Engineering LTHs / X-pipe / GPI port/rod-mod intake manifold / Circle D 3200 278mm Converter / 3.91 gears / DynoSteve tuned / 1LE Shocks/Struts/Toe Links / ZL1 Rear Sway Bar / Z/28 Trailing arms / Prothane Radius Arm & Subframe Bushings / BMR UCA Bracket, Steering rack bushing / B&M Tranny Cooler / RX Catch Can / Jannetty Tranny Dipstick / 2012+ Heater Hose / 2013+ Rearview Mirror / Fuel rail flip / Drake shifter / Oil Cooler Delete |
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12-30-2019, 01:32 PM
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#9 |
 
Drives: 6th Gen NicKey Camaro & others. Join Date: Nov 2015
Location: Loves Park, Illinois
Posts: 492
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I don't recall having picked up 25 rwhp going from 1 7/8" to 2" headers, but the 2" made more power from 2,500-3,000k to peak in a cammed, FI application. You can usually pick up that much or more going from the stock 2.5" H-pipe to a 3" X-pipe at 600rwhp plus. Also note that not all headers make the same power. Some are indeed better than others and why go through the trouble if your not going to optimize the combination via a proper tune?
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12-30-2019, 08:45 PM
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#10 | |
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Drives: 2015 ZL1 Join Date: May 2015
Location: wisconsin
Posts: 139
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Quote:
texas speed,etc....
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4 innovations twin pump fuel system,DSX flex sender,28% lower,1 7/8 dynatech headers,id 1050s,rotofab intake
LS 2 ported throttle body,elite catch can,JRE rough idle cam,active innerchiller, tuned by JRE....  |
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12-30-2019, 09:41 PM
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#11 | |
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fo'shizZL1
Drives: 2017 ZL1 Join Date: Aug 2017
Location: ATL
Posts: 1,281
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Quote:
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2017 ZL1 M6 Black | Maggie 2650 // 103TB // Big Gulp
Past Rides- 2014 ZL1 M6 Red Hot | Tons of mods 2004 CTS-V M6 Silver | Many mods 1995 Corvette M6 Torch Red | A few more mods 1992 Camaro M5 White | A few mods |
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12-30-2019, 09:47 PM
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#12 |
 
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I've had Kooks on a lot of my past cars and plan on going Kooks 2in on my ZL1. I know they are usually the more expensive option. But they have always had perfect fit, finish and looked new after a couple of years. I believe the only tuned length headers for our cars in 2in primaries are ARH. But don't quote me on that. I don't honestly know or have proof if theres a significant power difference though.
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2012 BLK ZL1 M6: Rotofab CAI,20in Z28 Reps,5% tint,6K leds/hids,VMaxx TB,JLT CC,BTR Stage2PDSTQ Cam & Valvetrain,Holley VC, AFCO HX,BK Fab HX Tank,MGW Flatstick,Kooks 2in coated headers catless,BMR bushings & arms,160*,2.45 upper,ID1050s,Shane Hinds tuned, Pedders Xa Coilovers,DSX Aux pump & Flex Fuel,Corsa.
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12-30-2019, 11:31 PM
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#13 |
Drives: 2013 Chevrolet Camaro ZL1 Join Date: Jul 2019
Location: Victoria, TX
Posts: 22
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After installation of your headers, is there a way to keep the belly pan on?
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12-31-2019, 04:48 AM
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#14 |
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Drives: 2013 ZL1 Join Date: Dec 2015
Location: Gulfport, MS
Posts: 250
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ARH are officially sanctioned by GM.
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