Thread: Ported exaust manifolds

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  1. #1 Ported exaust manifolds 
    club of used to own a gp 99prixgt's Avatar
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    Ported Exhaust Manifolds: 3800 Performance

    any thoughts on these? or are the ZZP ones better?
    16' wrx sti- stock
    06 Spice Red GTO- m6/exhaust/tune/suspension/377whp-383tq-sold
    99 silvermist gp gt-g5/xp/IC/3.0mps-parted&sold
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  2. #2 Re: Ported exaust manifolds 
    Donating Users Quicklynx's Avatar
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    do it yourself! haha, quit being lazy!
    2005 IBM Pontiac GTO, Built 4.8L .84 Twin Turbos
    1998 Pontiac Grand Prix Daytona Edition, Sold
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  3. #3 Re: Ported exaust manifolds 
    GT Level Member DnaProdigy's Avatar
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    I would spend the extra $130 and get pacesetters. Or minus $100 and get a plog, since the rear manifold isn't extremely restrictive [or so iv heard].
    2006 Grand Prix GXP
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  4. #4 Re: Ported exaust manifolds 
    Donating Users Quicklynx's Avatar
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    btw, I hope you know I was joking with you above^^^
    2005 IBM Pontiac GTO, Built 4.8L .84 Twin Turbos
    1998 Pontiac Grand Prix Daytona Edition, Sold
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  5. #5 Re: Ported exaust manifolds 
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    If you have the money, get headers. If not id go with the plog. It gives the engine bay a nice touch(if you get stainless), and saves you from buying dremel tool bits to port you stock manifold, and if you mess up the porting then you could mess the flow up.
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  6. #6 Re: Ported exaust manifolds 
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    We do ported mani's to. $180 for ours, but I'm out of stock on them right now. If you want I can get a set here and have them done next week.
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  7. #7 Re: Ported exaust manifolds 
    GrandPrix Junkie Sabrewings's Avatar
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    For N/A engines a Plog is plenty. No need for headers. Don't get ported manifolds since the front can't be ported past the primaries (where it needs it) and the rear isn't restrictive.
    2004 Impala LS - got some mods sold!!!
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  8. #8 Re: Ported exaust manifolds 
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    hey guys just wondering what a Plog is.
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  9. #9 Re: Ported exaust manifolds 
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    Quote Originally Posted by static2489 View Post
    hey guys just wondering what a Plog is.
    A Plog is a less restrictive manifold which increases exhaust flow therefore increaseing power and reducing KR.

    http://www.zzperformance.com/products_img/208_1.jpg

    ZZ Performance
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  10. #10 Re: Ported exaust manifolds 
    club of used to own a gp 99prixgt's Avatar
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    Would i loose some power if i get the pacesetter headers with 1-5/8'' primaries? they are almost as much as a full set of plogs from zzp.
    16' wrx sti- stock
    06 Spice Red GTO- m6/exhaust/tune/suspension/377whp-383tq-sold
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  11. #11 Re: Ported exaust manifolds 
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    Quote Originally Posted by 99prixgt View Post
    Would i loose some power if i get the pacesetter headers with 1-5/8'' primaries? they are almost as much as a full set of plogs from zzp.
    No you should gain power, but the pacesetters have had problems with sealing up flush and leaking. Unless your turbo, you dont need the rear powerlog. The rear mani. isnt nearly as restrictive as the front.
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  12. #12 Re: Ported exaust manifolds 
    club of used to own a gp 99prixgt's Avatar
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    thanx man, ill prolly just get the plog and call it a day, i was reading and with the cartuning turbo kit they recommend stock manifolds witch is odd...
    16' wrx sti- stock
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  13. #13 Re: Ported exaust manifolds 
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    Quote Originally Posted by 99prixgt View Post
    thanx man, ill prolly just get the plog and call it a day, i was reading and with the cartuning turbo kit they recommend stock manifolds witch is odd...
    Stock mani's? that is odd A smoother path and larger primaries (i.e. plog) would have a better flow. Just seems really odd.
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  14. #14 Re: Ported exaust manifolds 
    GTX Level Member 02BlueGT's Avatar
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    ^^^Smaller primarys increase exhaust speed/pressure, spooling turbo faster
    2002 GT...CAI, Headers, Special Eddition two-tone leather interior added, HUD added, 12" Brake Upgrade, ZZP strut tower bars, gmpp sway bars, poly motor mounts, -6an braided SS fuel hoses , Hptuned, Headers, Top Swaped, 50lb inj, E85, 3.4
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  15. #15 Re: Ported exaust manifolds 
    GrandPrix Junkie Sabrewings's Avatar
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    I think they mean that you have to use stock type manifolds with their kit. Otherwise it won't bolt up right. People have seen large gains going from stock manis to ZZPs front and rear Plogs on turbo setups.

    And, you can't use the rear Plog without a turbo setup. Can't use headers with turbo setup, so your choices become pretty easy.
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  16. #16 Re: Ported exaust manifolds 
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    Quote Originally Posted by 02BlueGT View Post
    ^^^Smaller primarys increase exhaust speed/pressure, spooling turbo faster
    Yeah the velocity would be greater. this is what i get for posting late at night lol. Good catch 02BlueGT.
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  17. #17 Re: Ported exaust manifolds 
    club of used to own a gp 99prixgt's Avatar
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    ah yes now this makes sense
    16' wrx sti- stock
    06 Spice Red GTO- m6/exhaust/tune/suspension/377whp-383tq-sold
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  18. #18 Re: Ported exaust manifolds 
    Donating Users chrisb's Avatar
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    actually they use the stock manifolds because they handle heat a lot better cause of there size and weight, so there less likly to crack then aftermarket manifolds, but thats why you go with stainless it normally solves that promblem. the plog is 5 pounds lighter then the stock front exhaust manifold so theres less material to handle the heat.
    99 Grand Prix old build- CAI, Custom exhaust, HV3, Stage 2 TB, custom tune, ported heads intense s1x cam, headers.
    Nothing great Just a small T66 Turbo with a Hv3 On a stock tranny untill i finish the other one.
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  19. #19 Re: Ported exaust manifolds 
    GrandPrix Junkie Sabrewings's Avatar
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    Weight doesn't tell you much about the mass. Since the stock manifolds are iron you could switch to steel and them be the 5 pounds lighter without sacrificing any material.
    2004 Impala LS - got some mods sold!!!
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  20. #20 Re: Ported exaust manifolds 
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    good point, im not familiar of the weight of cast to steal but if you look at the plog it is much thinner then the stock ones.
    99 Grand Prix old build- CAI, Custom exhaust, HV3, Stage 2 TB, custom tune, ported heads intense s1x cam, headers.
    Nothing great Just a small T66 Turbo with a Hv3 On a stock tranny untill i finish the other one.
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