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Stock UICP vs. after market hard pipe

4926 Views 36 Replies 16 Participants Last post by  Get Rad
So I've been wondering and searching, we all know the stock UICP expands during increased boost levels, but how much will it make a difference for daily drivers that don't mess around with the boost level of the car? It seems that most people on this forum speak in terms of a heavy modding mind set. I know the more boost you run, the more the squishy pipe is going to expand. But what if you're not messing with the boost levels (with a boost controller)? Will the drop in throttle response be that much?

How much difference is it going to make for a conservatively tuned car with just a panel filter, cat back, fmic, and hi flow cat?
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Subscribed. Interested to know this too. Has anyone actually tested this? Seems like many do a UICP as one of their first mods so they wouldn't know.
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