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ARP Studs: Undercut vs. Standard?



IIRC, undercut is recommended for non turbo application, and std is
recommended for turbo application.

I bought mine (8V undercut) from some tuner in Florida. Can't remember his
name, or find any past post about them. But they were cheap, and delivery
was fast.

Cheers.

Marc
'83 Scirocco
'97 A4 Q

> 
> As I understand it, it means you don't have to retorque after X number of
> miles of driving once they  are installed.  Hopefully someone more
> familiar
> will chime in...
> 
> David
> ----- Original Message -----
> From: "Rick Kellner" <rfkellner@snet.net>
> To: "'Scirocco List'" <scirocco-l@scirocco.org>
> Sent: Friday, November 25, 2005 11:03 AM
> Subject: ARP Studs: Undercut vs. Standard?
> 
> 
> > ARP lists two types of studs for VW heads, one set is a "Standard" set
> > and the other is an "Undercut" version.  A brief description from a
> > vendor's site briefly describes the difference.   Other than the brief
> > description below does any want to add some information to clarify the
> > benefits?  BTW, the cost difference is $15 however; still trying to
> > understand the benefits and how.
> > Thanks, Rick.
> >
> > "You will also note that ARPR offers specially undercut studs for
> > several engines. This procedure (done only to the shorter studs) more
> > equalizes the "stretch" of both studs, which makes for a more consistent
> > clamping force-one that compensates for head gasket compression when the
> > head is installed. This helps prevent blown head gaskets, and assures
> > optimum sealing!"
> >
> > Link to the two sets
> > http://www.nolimitmotorsport.com/prod/arp-204-4204
> > http://www.nolimitmotorsport.com/prod/arp-204-4702
> >