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Thread: what size matters

  1. #1
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    VN SS

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    Default what size matters

    hi everyone im just getting my 355 stroker built at the moment and i am just wondering what size exhaust i should go for i mean 3" as a minimum with packmaker extractors and a high flow cat but i am wondering are you able to run a duel side by side system as is have both exit on the same side of the car
    Next i would like to know what is involved with getting a duel system with duel outs on each side of the car, is there any way around the fuel tank or do i have to look at a fuel cell in the boot, thanks for the info
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  2. #2
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    VX HSV Clubsport

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    Sydney, eastern suburbs
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    Default

    i am looking at the same type of set-up, i want a pipe out each side of the car but i was having a look the other day and yeh the fuel tanks in the way, so i am also wondering how?
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  3. #3
    1991_Vn2nV's Avatar
    1991_Vn2nV is offline Donating Member
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    91 VN Berlina & 03 VY Berlina

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    Both pipes come back down the same side then after the fuel tank one pipe is bent back and runs across to the other side where it comes out the back right hand side.

    Lots of mandrel bends.

    For a 355 stroker a twin 2.5" exhaust would be good.

    I'd suggest running dual 2.5" side by side. Its a bit of a waste of money going one pipe out each side imo

  4. #4
    1991_Vn2nV's Avatar
    1991_Vn2nV is offline Donating Member
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    N also dont underestimate a twin 2.5" exhaust...it flows very well. I wouldnt go bigger unless you were thinking of modding the engine quite heavily and perhaps going forced induction

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