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Best exhaust set up for hp ?

This is a discussion on Best exhaust set up for hp ? within the External Engine forums, part of the LSx Technical Help Section category; what do you guys think would be the best exhaust setup for the most hp for a 98 z28 A4 ...

  1. #1
    The Red Reaper 98Z28importslayer's Avatar
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    1998 Camaro Z28 T-Top A4

    Best exhaust set up for hp ?

    what do you guys think would be the best exhaust setup for the most hp for a 98 z28 A4 (ls1) ? its pretty much stock just K&N filter, lid, EGR delete. I was told to do true dual straight pipes is this correct ?

  2. #2
    Ebaaaaaaaaa Speedy_Gonzales's Avatar
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    Quote Originally Posted by 98Z28importslayer View Post
    what do you guys think would be the best exhaust setup for the most hp for a 98 z28 A4 (ls1) ? its pretty much stock just K&N filter, lid, EGR delete. I was told to do true dual straight pipes is this correct ?
    that is the set-up I want on mine

  3. #3
    Rice Killa JwMonE99's Avatar
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    Black With T-Tops
    96 Z28 M6

    I believe X pipe would be the best way to go.

  4. #4
    LSX whore allbaugh_04's Avatar
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    Quote Originally Posted by 98Z28importslayer View Post
    what do you guys think would be the best exhaust setup for the most hp for a 98 z28 A4 (ls1) ? its pretty much stock just K&N filter, lid, EGR delete. I was told to do true dual straight pipes is this correct ?
    I don't have true duals, but don't forget it's supposed to be pretty damn loud...but yes, usually true duals net the highest hp gains.

  5. #5
    member since may 2000 nhraformula's Avatar
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    2000 nhra edition formula

    duals will get the best overall power but to run them all the way to the back=big bucks.
    get a catback of your choice and a cut out. way cheaper and will net you the same power just about.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  6. #6
    Member Speed Psychosis's Avatar
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    98 T/A M6 w/lid and LM1

    ^ what about the texas speed 3" duals? they are like $300, i think. get those and longtube headers for best performance.

  7. #7
    2-Legit-2-Quit bgable's Avatar
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    2006 Pontiac GTO

    i have LT's and TSP duals with bullets pick up a good hp gain and i love the sound and i get lots of compliments on how it sounds

  8. #8
    Junior Member cj3489's Avatar
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    Orange and Ghosty
    2001 WS6 m6

    any contact info for texas speed???? thanks

  9. #9
    LS1 chosen son lemons12's Avatar
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  10. #10
    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by Speed Psychosis View Post
    ^ what about the texas speed 3" duals? they are like $300, i think. get those and longtube headers for best performance.
    only thing i dont like about those is they dump under the car. otherwise, they should make the most h.p out of any set up.

  11. #11
    Member Speed Psychosis's Avatar
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    98 T/A M6 w/lid and LM1

    ^ thats better for horsepower though. but yes, it will be much louder in cabin and not look as good. if it were me I'd have the muffler shop extend it out, but its still a pretty affordable dual setup.

  12. #12
    Senior Member Bottesini's Avatar
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    I have a set of custom duals that dump before the axle. With long tube headers and a mild cam it is not that bad. I use the car as my DD, about 1200 miles a month on average. It does have a bit of a nasty drone below 1800 RPM in sixth gear, but other then that the inside is not bad at all. Outside or when I get on it hard it is defiantly noticeable.

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