Trying to order my rims right now through summit and I freak'n forgot what the bolt pattern was...vadim says they are 5 on 4.5 but that doesn't sound right...

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Nice car: 1988 Formula 355, mildly ported/polished Vortec heads, RPM intake, Comp Cams Extreme 268 cam, 650 Holley double pumper, 5-speed/3.73 Richmond gears, and N02 on the way
Old 1/4mile: 13.5@105mph

Evil Car: 78 Pontiac Grand Prix, 500inch caddy motor, edlebrock intake,HP Holley 750 DP race prepped carb, B@M TH350 tranny, 16inch Iroc-Z rims, blacked out chrome, soon to run 10's...

There's no replacement for displacement!

 

5 on 4 3/4"
jms

 

ahh ****, and one more stupid question I forgot...what size are the wheel studs on my Grand prix?? 7/16? 1/2inch?

 

it's your grand prix why don't you go out and check the stud size instead of posting here? just a WAG but i'd say 7/16 or 12mm.

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-=ICON MOTORSPORTS=-

 

Cuz I'm a lazy *** **** and how do you check thread size anyways

 

with a nut or die of known size. a bolt or tap laid aginst the stud would match up perfectly would also work. a thread gauge and a tape measure.

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-=ICON MOTORSPORTS=-