ARP BOLTS

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Nov 13, 2015 | 10:22 PM

fabieber

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Joined: Feb 2009

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From: Ridgefield, Washington

ARP BOLTS

I am trying to find ARP bolts which seem to be the only bolts I can use to put Ramhorns exhausts on my '55 / 239 Y Block. I have found several web sites that sell kits for various engines but none that fit my truck. Should this be a hardware store item where I can buy 14 bolts I need.

By the way, the size I need is 3/8 by 1 1/2" x 16 threads per inch.

I cannot get a socket over the bolts. I have found some allen head bolts that I could use but the heads are so small I'm concerned they may not be a good idea.

Nov 13, 2015 | 10:56 PM

CharlieLed

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Joined: Aug 2006

Posts: 8,094

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From: Brentwood, TN

John Mummert does not list an ARP bolt for his manifolds HOME Y
I would contact him to see what he recommends.

Nov 13, 2015 | 11:33 PM

1950FordF1

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Joined: Jan 2014

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If you can't find what you need call them direct. I don't use ARP often but have ordered direct before.

ARP | The Official Web Site

Nov 14, 2015 | 12:06 AM

eman92082

Cargo Master

Joined: Apr 2007

Posts: 2,063

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From: Valley Center, California

I used ARP exclusively on my engine purchased from Summit. There are sets for common applications but if need be, you can buy bolts and such individually.

Nov 14, 2015 | 12:09 AM

52 Merc

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Joined: Oct 2009

Posts: 16,188

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From: Burbank, WA

I would try to avoid basic hardware store bolts for exhaust manifolds. You want something that will take the heat cycling involved. The box stores offer some pretty low grade hardware that they sell for outrageous prices, especially for what it is. See if there's a real bolt store near you. There's a Tacoma Screw in Portland that could probably be helpful.

I know there's several places in my area that sell top quality hardware for much less than you'd think it would be, and they don't mind selling 25 cents worth of nuts at a time. I would think there would be at least that many in your neighborhood.

Nov 14, 2015 | 05:49 AM

fatfenders

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Joined: Feb 2001

Posts: 6,328

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From: Iowa

I think you will find what you need on page 87 of the ARP catalog posted. They have a reduced head fastener in bulk packages of five bolts. As 52 Merc says, I too would avoid hardware store fasteners for exhaust manifolds. They would be fine for temporary use but normally have a full sized head anyway.