Bowtiesblow said:Learn how to wrench on a car and you wont have a problem. When you mod a car things break, its a fact. A "stock" LS1 F-body is not going to need a new rear end. Maybe when you mod it yes, but modified LS1's make alot of power and lots of power will break stuff. Something stang guys arent used to.
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look, dude all this happened under warranty! So why the **** should I rebuild the rear-end over and over, or hone the cylinder walls and fit new pistons to stop the knock and oil consumption (blow-by due to piss poor quality control). Or glue a new ROOF down.
Sorry to break it to ya chief the car is totally stock.
7.652 ring gear in a 350 hp car= snap.
Hey man this is a Mustang forum. Go to Ls1tech check out the gears and axle forums
Then get back to us : Bowtye 

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.Going back and watching home videos of racing trips from then to around 2004 I have seen very few LS1's in the 12's and NONE stock. That is fast in my book anyday but it isn't 12's stock. With a tune/CAI and the above mods 12.80's with street tires have been the best for me with drag radials. Bone stock my MPH never was above 105 stock and with mods 108 was the norm.Maybe with slicks and open exhaust 12's would be possible but with that lead crystal rear end I wouldn't advise it unless you have a trailer. I don't know if track location, extremely high humidity levels, extremely low ambient temps and a pinch of BS added for good measure but the only place I have seen a bone stock anything go 12's is in a magazine or on a message forum. Even at the F-Body Nats I have only met personally a handful of owners sneak into the 12's unless modded with at least a tune/ CAI/ exhaust/ drag radials. LS1s respond very well to mods and they are a marvel of modern technology but a modded car isn't a stock car. Going to the track and talking to other owners and racing is the only way you are going to find anything out. Maybe LS1's are just faster at ATCO or Pomona or Gainsville but at Bowling Green low 13's are the norm for a stocker. I am not saying a few 12 sec. stockers aren't out there but I am saying the odds of seeing one beside you in anytown USA is slim. Learn how to bang the gears and invest in a tune and a CAI and go hunting. Leave the BS to the ricers and the spectators.