Pulley setup 4 03-04 cobras

I asked the same question and the general consensus is Biilletflow

http://www.billetflow.com/supercharger_pulleys.htm

i would go with a billetflow 2.93 upper, 2lb lower, and a 100mm idler. You could also upgrade to the billetflow idlers. Then get the blower ported (stage IV) and get it dyno tuned with the SCT x-cal 2. Easy way to get 500rwhp.

I wouldn't go with anything smaller than a 2.93 on the stock blower. Any more boost than that really just turns the M112 into a giant heat pump and heat soak ensues. If you want to run something smaller than the 2.93 or want to add a lower get the blower ported first.

The SCT programmer is a great choice, just don't rely on the tune that comes with it. You'll want to get the car on a dyno and have a pro tune it. Those tunes that come with the handheld tuner from the manufacturer are really not that good. Spend the extra money to have it tuned properly.

U.M.