draw thru
I had the exact same problem. the issue is that the MAF on the kit is too close to a bend and is getting alot of turbulence. makes it untunable. so i took the pretty blow thru pipe, welded up the MAF hole, drilled and tapped a hole for the air charge sensor, and am running it draw thru. one thing you will notice with this setup is that if you barely get into boost and get out by clutching, you will throw a 061b code sometimes, or you will get the limp mode wrench. a baffle needs to be welded into the BOV pipe on the intake to push the air twords the turbo (may not work, but should)