Unit, no offense taken, I love wxpressing my opinion, that is what God invented them for
2fast- If you plan on getting aluminum heads in the future, why not use the money you would buy the GT-40's with and save it towards a set? IMO, you'd only be wasting your money in that situation. I know it is hard living with stock heads. My Cobra I just bought feels like a snail compared to my last car that had TFS TW's.
It is up to you. The GT-40 Irons(Cobra Heads)will get you about 25-35 more hp....nothing to brag about, but hp is hp. The "P" heads are a little better, but only work the best with GT-40 componets. You will need different headers with those. I think thise put out about 35 more hp, but have more potential than the Cobra heads.
Good Luck
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Dustin
1993 Cobra #1926
Bassani Full lengths,Bassani short X-pipe, American thunder Cat back, 3.55's. More to come...