Rebuild stock 98 head or upgrade
04-15-2013, 10:57 PM
#1
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Rebuild stock 98 head or upgrade Wasn't sure how to word the title, I have a stock 98 Ls1 M6 107k and spun #6 Rod bearing so I've decided to do a complete rebuild. My question is should I just reuse and rebuild the stock 98 heads or upgrade to stock 99 or newer center bolt. Is there any difference beside the center bolt valve cover or Flow #'s, any insight would help.
04-16-2013, 06:57 AM
#2
Stock for stock there is a small difference if flow from your heads to the 243 heads, but if you are planning on porting/milling the heads it is pretty much a wash on which one is better...some will say the 243 have about a 10 HP potential over other stock heads.
If you upgrade to newer heads you will also need valve covers, and coil brackets.
If you upgrade to newer heads you will also need valve covers, and coil brackets.
