Mustang 03 GT

Everywhere I've read says that BBK UDP's are not the way to go (piggy back). Is this true? I've had these pulleys for about 2 months now and I have even tried to sell them. No one wants to buy them. I was thinking about chancing it and installing them on my car this week. Are they really that bad for my engine? Are they a good performance mod? Any help would be appreciated!

Sxynerd

Steeda's the best, don't let anyone tell you different. I think they are a waist any which way you look at it. But it's your money.

baino

its not going to hurt your engine. if you already have them, you might as well install them.

fruhdaddy

they arent as good as steeda because of the piggy back but Ive had mine for over 2 yrs now and have had no problems at all..