Whats the difference???

[DsmFighter]

Can anyone tell me what the heck is the difference? They are both listed for my car.


http://store.summitracing.com/partdetail.asp?autofilter=1∂=MCH%2D1176&N=700+4294908331+4294908282+4294924677+4294840044+ 4294925232+4294839035+115&autoview=sku (http://store.summitracing.com/partdetail.asp?autofilter=1&part=MCH%2D1176&N=700+4294908331+4294908282+4294924677+4294840044+ 4294925232+4294839035+115&autoview=sku)

http://store.summitracing.com/partdetail.asp?autofilter=1∂=MCH%2D1158&N=700+4294908331+4294908282+4294924677+4294840044+ 4294925232+4294839035+115&autoview=sku (http://store.summitracing.com/partdetail.asp?autofilter=1&part=MCH%2D1158&N=700+4294908331+4294908282+4294924677+4294840044+ 4294925232+4294839035+115&autoview=sku)

[E Green SVT]

one of them says sfi approved in the description thingy and the other one doesnt?

[Kirko]

first one doesnt come with mounting hardware and 2nd one does.

1st is Crankshaft Pulley, Serpentine, 6-Groove, Aluminum, Black, Ford, Mustang, 4.6L, Each

2nd is Crankshaft Pulley, with Balancer, Serpentine, Aluminum, SFI-Approved, Ford, Mustang, 4.6L, Each

[DsmFighter]

Ah ha! that makes sense. Might as well spend the 3 extra bucks just incase. thanks!