SCTPerformance - 6600 - Eliminator Switch Chip - Bypass Factory Limiters - Custom Tunes for 89-06 Ford Vehicles

took car to get dyno tuned and it has 1 tune with 4 tune available to be programmed...

Don’t buy unless u can download tunes yourself. This product isn’t bad if you buy off American muscles because they will do the tune before they even send it to you. I returned this one and bought the one of AM

I ordered this for my 1993 5.0 Mustang since it has heads, cam intake, injectors, etc. First chip wouldn't fit on J3 port unless I bent some ECU resistors down out of the way of the chip. Customer service said I could either bend the resistors down or send it back for one that fit as advertised. Not wanting to modify my stock ECU I sent it back. A month later the second chip showed up - same issue. I reluctantly bent the resistors down because I was eager to get it in the car. The car ran horribly, was spewing black smoke and all of a sudden my fuel pump wouldn't stop running. I gave it some time to learn the car as I figured it would get better over time. It didn't. I pulled it out and the car ran much better. However the fuel pump issue persisted - thanks BAMA. Luckily it just fried the fuel pump relay - didn't kill my computer. I returned it. After two months and 5 different incorrect refund amounts and endless calls to customer service I finally have my money back. What a waste of time and money. Get your car tuned by a professional. It will save you time and money.