When my motor was pretty much stock I added a GT-40 intake and the car did feel a little soggier down low. But the track does not lie. I gained a consistent 1-1.5 mph trap speed, and knocked a tenth or two off.
It might not feel faster, but it is. You really need to do the heads as said earlier to get the best performance out of it. As far as bang for the buck goes, 400 bucks is too much to pay for 10 hp at the wheels. (until heads!)
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1988 Mustang GT
11.8 @ 123 (7/14/01)
1992 BadAzz Wrangler
1993 Explorer
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