At a minimum you want to atleast use the upper duct piece regardless if it is SLP,FTRA or Whisper to isolate the air entering your engine from the radiator heat.
The extra flat lower piece that comes with FTRA is useless..
I prefer using the SSRA bottom piece because my I.A.T sensor readings show lower temps and the temps get colder faster..
As for seat of pants feel no you dont feel any difference between using the bottom SSRA extension or just using the upper duct piece..
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2002 Z/28 = Firemutt Racing 370 w/ Cam, Trick Flow heads, TPIS 90mm Intake & 90mm T.B., Vigilante 3600 t.c., Michael's Transmissions Built 4L60E.
QTP Headers, Mufflex Stainless Y-pipe, Pypes Performance Exhaust, Moser 12-bolt w/ 33 spline axles,Truetrac & 3:73's., Spohn.
Cartek Tuned...
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