First off, Hello to everyone. I'm new to the forum and this is my first thread.
I have a 2011 GS and its my first owned Vette. 436hp is plenty but if I can squeeze a few more out of it, why not! So the following list is what I'm planning on adding to the car. Just want to see what's your thoughts about it and it's performance.
HALLTECH 107MM COLD AIR INTAKE $500.00
NICK WILLIAMS 102MM THROTTLE BODY $570.00
FAST 102 INTAKE MANIFOLD $1000.00
MARTIN SMALLWOOD CAM KIT W 229/242 AND 615/598 LIFT ON A 112+4 DURATION $1000
LIGENFELTER 160 DEGREE THERMOSTAT
KOOKS 1 7/8 STAINLESS HEADERS (1400 BUCKS)
OFFROAD 1 7/8 X-PIPE $400
WILL KEEP STOCK NPP DUAL NOTE EXHAUST

 

I think id take that $1500 from the fast manifold and throttle body and put it into some ported ls3 heads.

 

I would do the heads to.

 

Also, based on my experience, you won't see much from the Halltech unless you cut the bottom of the shroud. Even then the damn filter is so bulky that it rests up against the shroud, which blocks that rear side of the filter. IMV, that system would work better if it used a filter that fit better into the space available, rather than employing the "worlds biggest air filter for the C6" approach. If I had to do it over again, I would just have used a Z06 air filter assembly (or just cut the goofy looking "muffler" off the side of the stock one and block the hole) and then use the Halltech "Beehive" cover (trimmed to fit the stock intake) and a Vette Air scoop.

That cam is going to be a bit lumpy. I'm assuming that you have an M6? If not, you're going to have to add a high stall converter to the list, IMV. I personally would go with a cam that someone else has used already that works well, that way you can get feedback on how it drives, how easy it is to tune, etc.

It's a matter of personal preference, but didn't go with the ORY on my Vette because I can't stand the stinky smell of unburnt gas which my cammed 6.2 Sierra produces. The cats that come on these systems flow really well and there's really no significant difference in power output between running and deleting them. You're gonna love how your car sounds when the NPP kicks open after the headers.

BTW: Welcome to Corvette forum. You will get some good advice on here from guys that are far more knowledgeable than me.

 

For the same $5K you've budgted for ... You could buy a blower kit and be over 550 to the wheels with a weekends worth of work.
Now if you are just adverse to forced air ... Get you heads ported or. Get some from PRC or someone similar, have your stock intake manifold ported, slide in a bumpy cam along with some long tubes and you could be near 500 to the wheels.

 

Yea an M6

 

Start with to tune to unleash all the power you have already to the wheels/ground, Hence un-cripple the TM that is holding a great deal of power back now.

If you still think that you are not burning the tires up fast enough/getting the car side ways enough , then you can add more HP.

 

I forgot to add that you should consider some drag radials like the Nitto NT05R, because if you're still running the stick run flats, you're going to need some extra traction to harness the extra power:

http://www.summitracing.com/parts/nit-207520

 

Thankay bud. Already have Nittos on it .

 

I have the same setup (M6 GS NPP). Wondering what ported-heads would do, pros & cons and cost?

 

Ported heads can be had for as cheap as $900 with core exchange. Figure 20-30whp bump across the rpm range.