UDP ARP bolt

[It's A G8!]

What is the part # for the extra long bolt from arp?

[Chewy]

What is the part # for the extra long bolt from arp?

It's not extra long! At least the one I used wasn't. It was pretty much the same length once you stuck the washer on it. Not sure of the number. Greg from Pace or Andy from Livernois could probably tell you and sell you one.



Underdrive Pulley Install extra.....

If you decide to purchase a second, 4 3/4 - 5 inch bolt to pull your Powerbond on, you need a 16MM (millimeter) 2.0 thread pitch bolt that is at least 4 3/4 in
120 mm. long. Stock GM Bolt is 4" long.

I ended up ordering a 130 mm bolt from Fastenal. The closest bolt was about 400 mi. away in Indiana!!!!! Arriving in 2 days. $8.00 cost.

You need to have this bolt in your possession before installing Underdrive Pulley.

Rob Moser

[g8_795]

It is a normal size bolt. The extra long bolt is used by some to get the pulley started on the crank shaft.

[wreckwriter]

ARP-234-2503 . As others said, it's not extra long.

[Crazy Paul]

ARP-234-2503 . As others said, it's not extra long.

ARP-234-2503
M16x2.0
Under Head Length 4.325"
Socket size required 1-1/16" AF