Buying underdrive pulleys...which brand?
 

Subject says it all http://www.mustangworks.com/msgboard/smile.gif

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1991 LX 5.0 Convertible:
AOD w/ shift kit, Steeda 3-pc. chassis stiffening kit, 4-pt. AutoPower roll-bar, the K&N, MAC shorties and cat-backs, 3.73's.

I am happy with my Al ASP's.

If you don't want to run aluminum pulleys and if you don't want to change the alternator pulley, go to a Ford dealer and order water pump and crank pulleys for a 1993 Cobra. I got the crank pulley last summer for $18.00 and I just ordered the water pump pulley for $15.00.

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Scott93GT
1993 Mustang GT
Silver CC/Titanium Accent GT, Black Clothe interior.
5 speed, 3.08's, 3 chamber Flows, K&N, Hurst Competition Plus.

1991 F150 4x4 XLT Lariat
Six Stick Regular Cab LWB Tow Vehicle

I agree with scott93gt. Few years back I bought march uderdrive pullies. The powder coat started to fall off in 6 to 12 months.
Engine bay doesn't lok that great with three rusty pullies looking back at you.

I'm using the March 2015 power and amp pullies. The smaller alternator pulley ensures full charge at idle even with the crummy 65 amp alternator. The pullies are now on my 94 Lightning that sees daily abuse.

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Russ L
'91 LX
Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles.