Wheel spacers studs help
 

I searched and have found some conflicting info so would appreciate some clarification.

I am keeping the stock 16" wheels on the car. For the rear I have 25MM spacers with pressed in studs.

For the front I have ordered 20mm hubcentrics, but they didn't come with the studs. I've got the dimensions of the longer studs I need but some people are saying I need the 3.25" ARPs or similar for the front, while some are saying the 2.5" ones. Can anyone confirm which ones I need? Also, any other brands/sources recommended? Canada preferred.

Anybody? I'm looking at these 2 but not sure if I should be going 2.5" or 3.25" for front 20mm spacers.

http://www.summitracing.com/parts/ARP-100-7708/

http://www.summitracing.com/parts/ARP-100-7713/