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installed headers

This is a discussion on installed headers within the External Engine forums, part of the LSx Technical Help Section category; just installed the mac mids with catted y pipe this weekend. def not an easy job lol thats for sure. ...

  1. #1
    Member Siciliano15's Avatar
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    installed headers

    just installed the mac mids with catted y pipe this weekend. def not an easy job lol thats for sure. there is barely any room to work and everything was so close that i couldnt believe it actually fit. The directions on that website on how to install macs were not anywhere close either. they said to install them from the top but i tried for about a minute and it woulda never happened. they installed from the bottom but i had to cut and grind off those two tab things that stick out of the engine right below the spark plugs. once i got those off the headers went in kinda easy. still have a few adjustments to do because something very occasionally hits the bottom of the floorboard and has a slight rattle.

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    King 0f n00bz shady milkman's Avatar
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    98' trans am

    that good sir will be gone if you change your motor mounts..besides that i dont know what tabs your referring to..are you talking about the motor mount clams ?

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    Member Siciliano15's Avatar
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    there are two tabs. one under the #7 cylinder exhaust port and one under the #6 port. they are about 3/4 inch wide and 1/2 inch high and stick out about 3/4 inch from the block and they were the obstacle preventing the headers from smoothly going up into place.

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by Siciliano15 View Post
    there are two tabs. one under the #7 cylinder exhaust port and one under the #6 port. they are about 3/4 inch wide and 1/2 inch high and stick out about 3/4 inch from the block and they were the obstacle preventing the headers from smoothly going up into place.
    hmm fair enough..i didnt even notice them when installing my QTPs...passenger and driver side slide in well...however i will have to do some more work on the k member ..since clearance is tight

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    99 Z28

    Quote Originally Posted by Siciliano15 View Post
    there are two tabs. one under the #7 cylinder exhaust port and one under the #6 port. they are about 3/4 inch wide and 1/2 inch high and stick out about 3/4 inch from the block and they were the obstacle preventing the headers from smoothly going up into place.
    Those are probably tabs that hold the block in the machining and and assembly process at the factory. They serve no purpose once in the car. I didn't notice them on mine either Shady.

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    Member Siciliano15's Avatar
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    lol well hopefully they dont serve a purpose cause i had to cut them down by about a half inch. had to do it by hand with a mini hacksaw too since the sawzall wasnt working. took me forever. as i was cutting it off i was hoping i wouldnt hit anything important haha.

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    King 0f n00bz shady milkman's Avatar
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    shit..you would know already if that was the case

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