ART Pipes Hardware

MaQG37 · 01-25-2017, 05:09 PM

I am looking to use high quality hardware to secure my ART pipes to my stock manifold. I'm going to be tightening my bolts because I have a leak somewhere and thought I'd replace my current cheap home depot stuff with good quality hardware. The size of the bolts I have found is (8) -3/8 x 1.5" Bolts
(8) -3/8 x 1.5" Nuts.

From a search, I found a user who used:

1) ARP SS bolt = 3/8-24, 1.5" length, 7/16" hex socket, (725-1500)
2) ARP SS washer = 7/16" ID, 13/16" OD, 1/8" thick (400-8509)
3) ARP SS nut = 3/8-24, 7/16" 12pt socket, (400-8302)

These are quite expensive for hardware. What is everyone else using?

crazy4oldcars · 01-25-2017, 05:39 PM

Can't comment to specific hardware, but I can for stainless nuts and bolts in general.
Make double damned sure you are using some form of never seize on those bolts. Even if it's just a trial fit up. SS bolts will gall up and freeze together at the slightest provocation. Or no provocation, lol.
I thought grade 8 bolts were required for automotive applications? Or is that just engine internals?

Good luck.

Kirk B.

ChaseZ · 01-25-2017, 05:54 PM

I just used the grade 5 hardware that came with the pipes. Though I also took out the ridiculous OEM threaded studs and replaced with normal bolts at the same time.

01-25-2017, 05:09 PM	#1 (permalink)
MaQG37 Base Member Join Date: Jul 2015 Location: Austin, TX Posts: 38 Drives: G37S 6MT Rep Power: 10	ART Pipes Hardware I am looking to use high quality hardware to secure my ART pipes to my stock manifold. I'm going to be tightening my bolts because I have a leak somewhere and thought I'd replace my current cheap home depot stuff with good quality hardware. The size of the bolts I have found is (8) -3/8 x 1.5" Bolts (8) -3/8 x 1.5" Nuts. From a search, I found a user who used: 1) ARP SS bolt = 3/8-24, 1.5" length, 7/16" hex socket, (725-1500) 2) ARP SS washer = 7/16" ID, 13/16" OD, 1/8" thick (400-8509) 3) ARP SS nut = 3/8-24, 7/16" 12pt socket, (400-8302) These are quite expensive for hardware. What is everyone else using?

01-25-2017, 05:54 PM	#3 (permalink)
ChaseZ A True Z Fanatic Join Date: May 2016 Location: Calgary Posts: 3,799 Drives: 16 370z Rep Power: 94683	I just used the grade 5 hardware that came with the pipes. Though I also took out the ridiculous OEM threaded studs and replaced with normal bolts at the same time. crazy4oldcars likes this.

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01-25-2017, 05:39 PM	#2 (permalink)
crazy4oldcars Enthusiast Member Join Date: Aug 2016 Location: SE Texas Posts: 448 Drives: '16 Nismo Tech Rep Power: 28413	Can't comment to specific hardware, but I can for stainless nuts and bolts in general. Make double damned sure you are using some form of never seize on those bolts. Even if it's just a trial fit up. SS bolts will gall up and freeze together at the slightest provocation. Or no provocation, lol. I thought grade 8 bolts were required for automotive applications? Or is that just engine internals? Good luck. Kirk B.