757Mustang

Can you use the stock size belt on a 2.80 pulley if i have a 100 mm idler pulley? The previous owner put a 3.00 pulley on with stock belt and idler pulley. I was reading on american muscle you need the 2.81 belt to use the pulley. But i didnt know if thats because you dont have the 100 mm pulley?

99 GT vert

This list the belt size you will need http://billetflow.com/IdlerBracket.htm

757Mustang

thanks for the website, but it doesnt have a 2.80 option but im assuming it is almost the same as a 2.76. I gues i need a 74.5 with a 100mm pulley when stock is 75.5 without one. Would a whole inch make that much as a difference? What pulley did you have on your eaton?

Timspony

I'm thinking you'll need a 74" belt

757Mustang

74.5 inch? or 74 inch? where do i get one?

757Mustang

i noticed on your torch red vert you have a 2.80 pulley ... do you have a 100 mm pulley with a 74 inch belt?

757Mustang

also on lethal performance they self a pulley and a pulley with a hub? do i need the hub? or do i already have one since the previous owner bought a 3.00 inch???

Timspony

NAPA sells both belts

Timspony

Yes....

757Mustang

Oh ok well lethal performance sells a 74 3/8 inch and 74 5/8... so which one then? Sorry to bug about this i just want to get it right