First off, this is going to sound like a rant. It isn't. I also want to make it clear that I have ZERO problems with any other companies making parts for Sonics. I actually have a few non-MPFab parts from other vendors on my own Sonic that are quite nice.
From my testing, I found the stock intercooler to be a huge bottle neck. I have tested this on a dyno, where I did 3 pulls, removed upgraded intercooler, and swapped the stock unit back in for 3 pulls. This was done with the car still on the dyno with only 2hrs between these two runs. You can see the time listed on the charts.
BOTH intercoolers were tested with upgraded hard charge tubes. The only difference is the intercoolers.
Peak tq was up 18wtq with gains as high as
25wtq through out the curve. Peak power was up 14whp with gains as high as
20wtq though out the curve.
I wouldn't have gone through all the testing and expense of producing these if this intercooler upgrade didn't make power. The Garrett intercoolers in my kit alone cost me more than this ZZP unit sells for at retail cost, but because I didn't skimp, I can post dyno sheets like this:
Buying "performance" parts without having data to support the "performance" moniker doesn't seems like a smart purchase to me regardless of how much cheaper it can be bought for.