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y pipe

This is a discussion on y pipe within the External Engine forums, part of the LSx Technical Help Section category; ok i have the factory LM1 cat back exhaust on my SS. i am ordering Kooks headers and y pipe. ...

  1. #1
    Junior Member Anti venom's Avatar
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    y pipe

    ok i have the factory LM1 cat back exhaust on my SS. i am ordering Kooks headers and y pipe. but ordering the y pipe there are options that fit to (stock outlet) or one that says it fits to (OFY). which one do i need? ordering of WS6 store

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    NY Representative basballny2's Avatar
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    factory LM1? you mean factory SLP exhaust? if the exhaust is stock i believe its 2.5'' and you would opt for the stock option if you plan to keep the stock exhaust but if the exhaust is aftermarket you would opt for 3'' outlet to fit an aftermarket exhaust.

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    Junior Member Anti venom's Avatar
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    Quote Originally Posted by basballny2 View Post
    factory LM1? you mean factory SLP exhaust? if the exhaust is stock i believe its 2.5'' and you would opt for the stock option if you plan to keep the stock exhaust but if the exhaust is aftermarket you would opt for 3'' outlet to fit an aftermarket exhaust.
    yes the car came with a factory cat back from SLP which i believe is the LM1

  4. #4
    NY Representative basballny2's Avatar
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    if its the LM1 its guna be 3'' outlet. call mark at kyspeed and ask him he should know

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    Moderator Cutlass's Avatar
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    The OEM connection size is 2.75 inches and most catback use that size. So I think thats what you want.
    Kinda sucks, right? I have a 3" ORY that necks down to 2.75" to connect to the 2.75" connection on my Borla catback which expands back up to 3".

    If your current catback is connected to the stock ypipe then its connection is 2.75"

  6. #6
    Junior Member Anti venom's Avatar
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    Quote Originally Posted by Cutlass View Post
    The OEM connection size is 2.75 inches and most catback use that size. So I think thats what you want.
    Kinda sucks, right? I have a 3" ORY that necks down to 2.75" to connect to the 2.75" connection on my Borla catback which expands back up to 3".

    If your current catback is connected to the stock ypipe then its connection is 2.75"
    well i think it has the slp y pipe on it also. becaust it is not crushed down on the driver side like the stock ones

  7. #7
    Junior Member Anti venom's Avatar
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    actually this is what is on my car now im pretty sure.

    http://www.ws6project.com/user_stor/...roducts_id=100

  8. #8
    Moderator Cutlass's Avatar
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    yeah I think thats still a 2.75" OEM connection

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