Not needed but deff well worht it. Ther are a few differnt types, injen and RMM are big ones. I prefer the RMM heatshield becasue it seems to do more becasue of its design. Seems it woudl block more. I mean ur not gonna get massive gains from SRI but becasue you drive allot, the heat will get to the intake much more. I dont know how much the heatshields are.
Ecelica i think sellls the injen one, U can go to the Rodmillenmotors website and ask them how to purchase their heatshield. Deff suggest you ger one though.