LS2 Pontiac GTO

Im going to be getting a Lunati cam this week for my 2004 GTO (automatic). What im looking for is a near stock sounding idle, with a slight lope is fine. Car needs to be able to pass smog. I would like something that gives great mid & upper range power, but increases or keeps all of my low end torque. I also need to choose the one that wont cause any drivability problems like surging. I cant decide weather I should get the 55004 Lunati Hydraulic Roller Camshaft or the 55003. Does the RMP range listed make sense? I would think both of these cams would make power above 6000 RPM.Heres the specs:

Lunati 55004
Adv In/Exh Duration 283/283
Duration @ 0.50" 221/221
@.050" In/Exh .558/.558
@Lobe In/Exh .328/.328
Lope Sep Int C/L 114° Sep 110° Int C/L
RPM Range 2500-6000
Hydraulic Roller; Fair idle. Good all out street Performance or mild race cam. Valve train modifications necessary (valve springs).

Lunati 55003
Adv In/Exh Duration 282/287
Duration @ 0.50" 218/221
@.050" In/Exh .526/.534
@Lobe In/Exh .309/.314
Lope Sep Int C/L 116° Sep 112° Int C/L
RPM Range 2000-5000
Hydraulic Roller; Fair idle. Good high Performance cam with lots of mid range torque and upper end horsepower.

My current mods are:
K&N Aircharger
SLP Ported Polish Throttle Body
Kooks 1.75" Long Tube Headers With Cats
Borla Cat-Back Exhaust
Custom Predator Tune
NGK Tr55 Plugs

Beast96Z

iTrader: (21)

You should look into a Thunder 220/220 or 224/224. Both will pass smog and there both proven, reliable HP makers. You can look at them here: Thunder cams The Lunati cams use a very soft lobe which in turn won't idle as well or make as much low-mid range power.