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Heads on a 98 ls1

This is a discussion on Heads on a 98 ls1 within the Internal Engine forums, part of the LSx Technical Help Section category; This winter I want to do some upgrades on the motor. Better intake with larger TB, new push rods, better ...

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    Member speedracer25f's Avatar
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    Midnight Blue
    1998 Trans Am

    Heads on a 98 ls1

    This winter I want to do some upgrades on the motor. Better intake with larger TB, new push rods, better Cam... As far as the heads I was told to get newer better heads, but I was wondering if I an do just as good by porting and polishing the heads of the 98? Maybe shave them down a bit? Any info would be great.

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    Simpsons Did it!! 98formy's Avatar
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    83 Z28 new project
    98 Formula WS7-sold:(

    The biggest difference in the 98 heads to the newer heads is that the 98 heads are perimeter bolt valve covers and the newer ones are centerbolt. Performance wise, there is really not a noticeable difference. If you go newer, you need to get the newer valve covers and coil brackets. I just stuck with my older ones, port, polish and bigger valves, and I like them a lot.

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