Thread: My current PLOG + 3" DP setup vs. ZZP Headers

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  1. #1 My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member 97AutoXVette's Avatar
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    Wanting to get some info on how much of a benefit I will see when installing ZZP headers over my front powerlog and 3" ZZP downpipe. Worth it??

    Anyone gone from my setup to headers and noticed gains and/or quarter mile time improvements?

    Open to comments, feedback, suggestions.
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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  2. #2 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member Burbman's Avatar
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    Getting ready to do the same thing except with SD headers, anxious to see the replies.
    2002 GTP Coupe, PSE supercharger ported with 3.4 pulley, Wizaired CAI, ZZP tune, AL 104's, front Plog, 3" DP, u-bend gone, hi-flo cat, W-Body tubular trailing and lateral arms, GMPP sway bars, Vogtland springs, 245/45-18 Michelin Pilot Sport AS/3 on 18x8 wheels, 42mm offset, Dual Aeroforce interceptor gauges on A-pillar pod
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  3. #3 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member 97AutoXVette's Avatar
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    yeah, I will be on a 2.8" pulley with a FSIC shortly.. I would think my current exhaust setup is going to start to be the "choking" point pretty soon (if not already)
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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  4. #4 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member 97AutoXVette's Avatar
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    Looks like I will just have to install them to find out!!
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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  5. #5 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GrandPrix Junkie SgtMarshal's Avatar
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    I think ZZP claims the powerlog will support up to 300 hp, which I would imagine you are approaching with a 3.2" pulley and supporting mods, so the headers should help a bit. This is just an estimate, however.
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  6. #6 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member 97AutoXVette's Avatar
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    Quote Originally Posted by SgtMarshal View Post
    I think ZZP claims the powerlog will support up to 300 hp, which I would imagine you are approaching with a 3.2" pulley and supporting mods, so the headers should help a bit. This is just an estimate, however.
    yeah, have been running a 3.1 pulley lately on corn. currently have a 2.8 pulley installed with my intercooler while I finish installing that. I would imagine the stock rear manifold and crossover are starting to become fairly restrictive. ZZP headers arrive in the mail tomorrow!
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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  7. #7 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GT Level Member willie14's Avatar
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    That's a pretty huge dent in the pocket at $900 just for some headers....mostpeople on here seem to run the SD headers withno problems as long as clamps get swapped out. Plus only costin a lil over 200 frees up cash for other mods��
    98 Grand prix SE to GTP conversion( in works). Full body conversion in works, drilled n slotted rotors, ceramics, all new suspension, custom CAI, NGK wires/Vpower plugs, SD headers, 180 Tstat, AND A WHOLE BUNCH OF PAINT BABY!! Tuned by E&J performance.
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  8. #8 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member 97AutoXVette's Avatar
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    Quote Originally Posted by willie14 View Post
    That's a pretty huge dent in the pocket at $900 just for some headers....mostpeople on here seem to run the SD headers withno problems as long as clamps get swapped out. Plus only costin a lil over 200 frees up cash for other mods��
    I actually landed a good deal on a used set. I agree, would not have paid the money for new ones!
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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  9. #9 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GT Level Member willie14's Avatar
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    I mean yea they look nice but with SD's only a third of the price they're actually pretty good quality. I'm pretty happy with mine
    98 Grand prix SE to GTP conversion( in works). Full body conversion in works, drilled n slotted rotors, ceramics, all new suspension, custom CAI, NGK wires/Vpower plugs, SD headers, 180 Tstat, AND A WHOLE BUNCH OF PAINT BABY!! Tuned by E&J performance.
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  10. #10 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    Donating User Swiggles's Avatar
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    Quote Originally Posted by willie14 View Post
    That's a pretty huge dent in the pocket at $900 just for some headers....mostpeople on here seem to run the SD headers withno problems as long as clamps get swapped out. Plus only costin a lil over 200 frees up cash for other mods��
    They where $760 during Black Friday
    No more GP 04 Impala SS Indy:
    Gen V 3.4”|FWI|N* TB lq4 MAF|1.9 Modded Rockers|F&R Plogs|ZZP 3" Catted DP|ZZP 2.5" Catback|
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  11. #11 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GrandPrix Junkie SgtMarshal's Avatar
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    I remember seeing them for 700 a while back. I'm sure they are much higher quality than the SD headers.
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  12. #12 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    The Blue One blueguy's Avatar
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    I would never waste even $600 on new headers for a WBody.

    SD's are just fine...and 50-100 bucks worth of modifications and they're just as good.

    Get better clamps, RTV the slip joints, and replace the crappy flex/gooseneck downpipe. Done and done.

    You're not going to make any more power with ZZP headers over SD's anyways...unless you're looking for dyno numbers and you need more flow...then try tracking down some old TOG X's.

    IF you can find them.
    Last edited by blueguy; 11-29-2016 at 04:53 PM.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  13. #13 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    Donating User Swiggles's Avatar
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    If it's not for dyno numbers then what's the point lol
    No more GP 04 Impala SS Indy:
    Gen V 3.4”|FWI|N* TB lq4 MAF|1.9 Modded Rockers|F&R Plogs|ZZP 3" Catted DP|ZZP 2.5" Catback|
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  14. #14 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GT Level Member willie14's Avatar
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    Quote Originally Posted by Swiggles View Post
    They where $760 during Black Friday
    Oh man what a steal!!!! Lmao
    98 Grand prix SE to GTP conversion( in works). Full body conversion in works, drilled n slotted rotors, ceramics, all new suspension, custom CAI, NGK wires/Vpower plugs, SD headers, 180 Tstat, AND A WHOLE BUNCH OF PAINT BABY!! Tuned by E&J performance.
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  15. #15 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member 97AutoXVette's Avatar
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    True, they are quite expensive regardless of how you look at it (I guess even for the used set I picked up). A guy on the FB forums reached out to me recently that he picked up 3 tenths in his quarter mile time and something like 5 mph when going from an exhaust setup like mine to ZZP headers. Sounds like a nice improvement. Wondering if a similar improvement can be had with SDs (I would think so).
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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  16. #16 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GT Level Member willie14's Avatar
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    I cant imagine zzp or sd or obx or pacesetters, u name it would make any difference. They're all just about the same setup from the primaries to DP so which ever he had woulda prob gave him the same results. Zzps headers are nice since they have less leak points but like I said alot of us here are pretty happy with the SD set
    98 Grand prix SE to GTP conversion( in works). Full body conversion in works, drilled n slotted rotors, ceramics, all new suspension, custom CAI, NGK wires/Vpower plugs, SD headers, 180 Tstat, AND A WHOLE BUNCH OF PAINT BABY!! Tuned by E&J performance.
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  17. #17 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    Donating User Swiggles's Avatar
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    The air flow on headers is much better than the stock manifolds. Primary size isn't the problem with stocks, it's the flow. Basically anything is better than the stock manifolds. Way back before the plog the only other option was PEMs (ported exhaust manifolds) and those only cleaned up the openings to reduce turbulence of the airflow coming out of the heads.
    No more GP 04 Impala SS Indy:
    Gen V 3.4”|FWI|N* TB lq4 MAF|1.9 Modded Rockers|F&R Plogs|ZZP 3" Catted DP|ZZP 2.5" Catback|
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  18. #18 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member 97AutoXVette's Avatar
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    Used set of ZZPs came in last night. damn these headers are nice! Need to find some time over the holidays to get them installed. I am anxious to see what the car runs like with the FSIC and ZZP headers installed. Will post some pics when I have a chance
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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  19. #19 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GXP Level Member GTPpower's Avatar
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    Headers have shown to actually give almost no gains on decently modded cars. I wouldn't be surprised if you pick up no power.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  20. #20 Re: My current PLOG + 3" DP setup vs. ZZP Headers 
    GTP Level Member 97AutoXVette's Avatar
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    Quote Originally Posted by GTPpower View Post
    Headers have shown to actually give almost no gains on decently modded cars. I wouldn't be surprised if you pick up no power.
    I wonder why that would be the case?? Looks like the flowpath of these headers requires a lot less exhaust gas directional change, larger diameters for less restriction, better "vacuum" effects since the fluid can maintain higher velocity without changing direction as much, etc...
    1998 GTP sedan: sold, 1999 GTP coupe #1: sold, 1999 GTP coupe #2 on E85: totalled
    2002 GTP sedan:
    3" downpipe|PLOG|poly mts|160 T*|60# Injectors|ZZP Intake|1.8 YT RRs|Ported Gen3|Ported ZZP S2 TB|E85|FP rewire|ZZP FSIC|WP UD Pulley|2.8 MPS|HP-Tuners
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