View Full Version : 04' Cobra Rear End

10-06-2004, 04:17 AM
I've just got my Cobra and in the next 6mths to a year, I plan on replacing my Eaton S/C with a Whipple and getting somewhere in the range of 600hp. I was just wondering if the stock rear-ends on the Cobras can handle this much horsepower without problems?

10-06-2004, 06:48 AM
I've heard that they can handle that type of hp. I would suggest maybe bracing the pumpkin or changing out the bushings... what do you plan to do with the car?

10-07-2004, 02:24 AM
I've got the Cobra and a F-150!
The Cobra is just a weekend and summer driver! In Shelby, NC they have a 1/8 mile dragway I go to sometimes.
I don't want to put so much hp into it, were it causes changes in the daily drivability!
Do you recommend anyone around here that can do the work?
I've called some other places, but Tony (need-4-speed) has had the most info and knowledge about everything, so I feel comfortable with them, plus they're one of the SCMC vendors!! I just don't really want to drive down to Florida, just for some work to be done on my car!

10-07-2004, 04:35 PM
BilletFlow sells a steel brace that bolts directly to the dif to stiffen the housing.

10-09-2004, 11:49 PM
Was at the track earlier tonight with a buddy and his 2003 Cobra. His car just came back a couple of weeks ago from being dyno tuned at Delks Performance. The dyno sheets they gave us when we picked up the car showed it putting out just over 600 hp. The only change made to the rearend has been 4.10 gears. It handled several 5000 rpm launches on DOT approved slicks tonight without even a hint of a problem.

10-10-2004, 02:03 AM
Watch your halfshafts.

Often times they will show signs of wear and tear before they snap.

There are halfshafts out there that the 10.1 second , stock suspensioned, IRS'd, 03 cobra in Houston run that are pretty stout. He still snaps them though.

BTW, I was at the track a few months ago, and staging in front of me was a 2004 Yellow Cobra. He snapped his halfshaft.. I made my run and saw him afterwards loading it on a trailor. Turns out it was bone stock with 500 miles total on the car.... so I would at least plan on beefing up the halfshafts.

10-11-2004, 10:25 PM
I was taking a look at the need-4-speed.com website and I've found somethings that will strengthen my rearend. I was wanting to get some feedback from you guys to see what you think?

RearEnd Girdle/Cover - TA Performance
Carbon Fiber DriveShaft
GKN HalfShafts

Just a few things that should help out!