They are a copy of the baseline kit that Kevin has been making for eons.
Cannot speak to the Z, but the baseline has made my car consistent even when spinning (too much rpm off the line).
Really like working with Kevin, very helpful in choosing the right kit, and in dialing it in after purchase.
He's on this forum a bunch helping folks... KEVIN$...
Ok, I'll look into those as well.
-90GT (Original owner MM&FF 7/13)-CHP 349 Stroker, Paxton Novi2000, Ben Alameda Ported Twisted Wedge Heads, Ben Alameda Ported Cobra Intake, Comp Cam, Snow Performance Stage 2 Meth Kit, BE Tuned
-92 SSP Coupe- GT40 Heads, E303 Cam, TFS intake, Nitrous Express Proton Kit