AMS13

Ok here's the scoop, I picked up a bone stock 00 M6 Formula about 2 months ago. It stayed stock for about 3 days until my first batch of go fast goodies came in, BBK LT's, SLP LID, TSP Rumbler (way to quiet), and Frost tuned it. Since then I have been lurking trying to figure out what my next mod should be. I am up between a LS6 intake/ Ported throttle body, or 3.90 rear gears. I don't plan on going to the track anytime soon seeing as i don't want to have to worry about walking home, basically all i do with the car is cruise, once in a while I hammer the gas and like to feel the pull. I am on the highway for most of my time and would like to retain some of the mpg this car produces. what should i do next!?!?

lemons12

iTrader: (71)

Intake gets my vote.

You will need a retune after gears and they weaken rear. It would make the biggest difference but cost the most and have the largest negative impact.
Consider a cutout as well, if you want loud.

AMS13

even if all my playing around is from a roll? Any one know of any problems if I were to take the catback off and run a single chamber flowmaster off the Y pipe? I have had cutouts on all my vehicles and 3/4 of them leaked + i like the sound of a muffler better then a cut out on a stock cam car.Would you feel a SOTP difference with the intake/tb?

MEGATRONSS

iTrader: (2)

I'm kindof in a similar boat with mods. Full bolt ons basically but have been debating on getting gears.

For the intake manifold and TB, it's not really going to be a seat of the pants feeling it's gonna be in the throttle response, the power is gonna be right on the pedal. Not as much seat of the pants like headers were in the higher rpms.

MEGATRONSS

iTrader: (2)

So get gears would be my vote, not speaking from experience on this but I wouldn't think gears would be that much of a risk point if you aren't launching it.

ULTIMATEORANGESS

iTrader: (4)

for highway runs id go with gears.

BOBS99SS

iTrader: (2)

intake, you can port your own tb ,its really easy to do , all you need is a few diff, grits of sand paper ,and a lil polish ,dremel helps but is not needed , then get a cam ,

99 WS-sick

iTrader: (2)

zo6 cam and dyno tune.

pcmforless in morresville NC has seen 370-390rwhp with these mods. im getting the headers,true duals (2.5in) over axle, ported TB and z06 cam an dynoed next month. total cost $1500+/- $100

lemons12

iTrader: (71)

Depends on your desired stopping point on most races.

My buddies C5Z H/C ran hard as **** and had stock gearing. 410s or the like would have just made traction dumb for anything below 55mph with street tires on.

Chances are you would enjoy the gears more in this case.

ULTIMATEORANGESS

iTrader: (4)

well a H/C zo6 is packing more than his car im sure.

lemons12

iTrader: (71)

3050# and 455rwhp with a mean curve, I'd assume you are right!

ULTIMATEORANGESS

iTrader: (4)

not good to assume but in this case it should be ok.

COPO9560

Lower gears will get you what you want on the road. If you plan future mods, you should consider going to a 12 bolt or 9 inch versus just gears in your puny 10 bolt. Costs a lot more but you get what you pay for.

AMS13

thanks guys, I think i may save and try to swing both at the same time! I would love to be able to break the tires loose w/o slipping the clutch, that would add a ton of fun factor to this car.

Tyler Z28

iTrader: (1)

intake

2000PewterT/A

I would definitely do the intake and throttle body first.

NC98Z

iTrader: (1)

There isn't going to be much of a difference if you do gears. You already have 3.42s. I would go with the LS6 intake and P&P TB.

BoricuaHec01

I would do intake/tb first for sure, that's what I'm doing after I get headers.

jebuzws6

iTrader: (5)

Just do a Fast combo intake set up, dont worry about the gears until you are ready to invest in a 12bolt or something, because like COPO said its not really worth investing in the 10bolt.

BoricuaHec01

^ Yea that's what I was gonna say, alot of people don't change their gears until they replace their 10 bolt w/ a 12 bolt or 9".