smityinms

I have a Fast 102 lsxrt cathedral intake and was wondering if anyone has tried it on ls3 heads with adapters. I wondering if it would do better than a ls3 intake before I buy one.

RedXray

The way I understand it from watching Richard Holdener's videos he doesn't recommend the square port FAST intake on square port heads as the gains are very little vs price. My guess is you'd be killing power adapting the cathedral intake to the square port heads vs the LS3 intake and square heads because that intake and head combo already works so well. You could sell the FAST and have enough money for a Nitrous Plate kit

smokinlmm

I looked into this, just go one way or the other. Those adapters seem to have mixed reviews.

low2001gmc

iTrader: (137)

Adapters No Good... If you got LS3 Heads, the L92 Intake is plenty good. Sell the Fast which you probably have trouble with idling and use sales money for some else... Good luck with your build.