991LE

iTrader: (2)

I have the 98 valve covers now. Is there anything else I need to know to bolt 98 heads onto a 99?

LS1_untamed_beast

Just wondering, why would you want to put '98 heads on a '99? The '98 heads do not flow as well as the '99 heads.

Jason

99ragtopSS

I have 98 ARE heads bolted on my 99 SS. Just keep track of the location and which spark plug the coil packs go to. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />

<small>[ November 08, 2002, 02:00 PM: Message edited by: 99ragtopSS ]</small>

991LE

iTrader: (2)

My coil packs are going to bolt up to the 98 valve covers??

felton316

There is no flow difference between the heads. The only difference is the way the valve cover and coil packs bolt to the head.