Fitech Ultimate LS intake kits
Regarding composite intakes based on my flow testing, DynoJet testing, and observations over the last 20+ years for NA applications when parts are correctly matched for horsepower
From the very worse LS4 to best a ported MSD.
LS4 < LS1 < LS2 intake < LS6 < Dorman LS2 90mm < TBSS < ported Dorman LS2 < ported TBSS < LS6 TPiS/LPE 90mm < Fast 90 < ported LS6 TPiS/LPE 90mm < Fast 90 ported < Fast 92 < Fast 92 ported < Fast LSXR 102 < Fast LSXR 102 ported < LSXRT < LSXRT ported< MSD ported
Ported = by a skilled expert porter
LSXRT* rocks on right combination but doesn't fit a lot of stuff due to height. Often has horrible driveability unless tune is near perfect
MSD - unported sort of goes against the idea of 7000+ rpm combo





