sedanman

iTrader: (10)

Does anyone know if PRC 5.3 2.5 heads will work on a stock ls1 with a MS3 without flycutting the pistons? Also what kind of compression does a set of 5.3 heads yeild on a stock motor. Thanks.

5.3LJimmy

iTrader: (10)

Static compression is 10.7 if the heads have a 63cc chamber(which I think they do). Best thing to do is call or email Jason at TSP and ask him to verify the combustion chamber volume and if it will work with the MS3. It seems like I remeber seeing a thread that said it will clear, but I would ask Jason to make sure.

Eurospec2

iTrader: (2)

If ordered together they set up the heads so no flycutting is required, i run this combo and i did not flycutt, works great

PBMFIsMe

iTrader: (5)

Check the Dyno results section. There are a ton of guys running that combo and making incredible power with it.