[GreyGhost702]

Just wanted to get a thread on this as both google and forum searches have produced few results. Mostly because the "LT1" key phrase gives so many non-Gen 5 results, hard to filter out in a google. Hope to get some feedback from others who have upgraded to ARP hardware, in case there's something I missed trying to figure out a few WTF moments.

I tried to upgrade as much fastener hardware as possible on my build, I've always been a fan of ARP on all my Ford builds, you could get virtually everything in ARP hardware and it works great, and of course, REUSABLE!

I feel like ARP has really let down the Gen 5 LT's this time around. I order ARP Rocker Arm Studs, but can't use them with my CHE trunions. The hat on the nut is too wide to fit within the flat of the trunion. So for now, I'm going to re-use the OEM bolts. Also, the ARP Studs would not have fit the OEM trunions either. There are 4 dimples that make you kind of thread the bolts through the trunion, and onto the head. It is the same for the ARP studs, the rocker won't slide over the stud, it gets caught on the trunion dimples. You ~could~ thread the stud onto the rocker, and then install the stud with the rocker on to the head. But that's not right. And not how a stud should work.
((ARP actually told me to drill out my trunions to make them fit the stud...))

So no ARP studs for LT rockers? That's not what the package says!

Also ordered ARP flywheel bolts. You can imagine my disappointment when I tried to put a socket on one. Of course later, I did find a post by oldman stating the same... wish I saw that post before I ordered them and tried to install. Again, package says 6.2 LT1 SBC. Yet, you can't use them. No method on earth, no modified tool exists. So ARP just made them and never actually applied them?

I'll be on the phone with ARP today to talk refunds and criticize them, lol. If you can only use ARP hardware under specific circumstances, that's something they should disclose with the product and instructions.

GM wins again, unfortunately. $90 for a set of flywheel bolts. No wonder share holders can't get enough of GM, lol.

[Gunkk]

Perhaps specific terms would be more useful ... gen5 is the engine, not the car.

https://www.google.com/search?q=arp+bolts+gen5+6.2

These guys apparently offer flexplate bolts (4th link from that query, no personal affiliation): https://www.michiganmotorsports.com/...astners/gen-5/

[GreyGhost702]

Originally Posted by Gunkk

Perhaps specific terms would be more useful ... gen5 is the engine, not the car.

https://www.google.com/search?q=arp+bolts+gen5+6.2

These guys apparently offer flexplate bolts (4th link from that query, no personal affiliation): https://www.michiganmotorsports.com/...astners/gen-5/

I meant that the Gen 5 LT1 was still reporting non-Gen 5 LT1 content. Gen 5 is the engine, because the car is not relevant in this case. I was only stating that I was unable to dig up specific information about LT1/LT4 folks using ARP rocker studs. Most of what I was finding was LS talk and older LT1 talk. If they are having issues with the Gen 5 LT1 rocker studs, again, not being talked about. I would think if using OEM trunions and drilling them out to fit ARP studs, it would be a topic of conversation somewhere, but I didn't find any threads on it. Same for the ARP nuts not fitting the CHE trunions.

Also, to my understanding, flexplate bolts are not the same as flywheel bolts. I think flexplate bolts are shorter. Also, ARP specifically states not to use their flexplate bolts on a MT flywheel. Some day, I will have to replace my clutch/flywheel, and when I do, I will make sure I can move away from OE hardware. Stealership wants $14 per bolt, and I need 8 of them. Then they tell me they'll have to order them. RockAuto only wants $7 per bolt. And I can get them 2nd day for $27. Guess who got my money? But the industry likes to discontinue hardware, so the last thing I want is to be caught in that shitty trap. Hopefully there are normal flywheels/clutch kits in the aftermarket lol.

Update, I did get in touch with ARP again this morning and they worked with me to find a nut that fits their rocker studs but has a smaller diameter flange. If it works out, they want pics to send to their team to push for kit options, as I am not the first person to contact them regarding issues with this stud kit. Won't help with drilling OEM trunions, but for the many running CHE's, it'll be nice to have the option for the smaller diameter nut flange. For the record, the nut flange will be slightly bigger than the OEM bolt flange, but within the CHE trunion's footprint. He said they advise keeping the kits torque spec and procedures, so nothing changes there. And he submitted a report for the flywheel bolts and said I wasn't alone in reporting non-fitment for the OE flywheel setup either.

Hopefully we have a solution for the rocker studs, will be nice to utilize those. I'll be returning the flywheel bolts.

[Baddawg53]

Guess I'm not the only one hundreds of wasted dollars into ARP hardware that doesn't fit... I have the flywheel bolts and the rocker studs sitting on the shelf

[GreyGhost702]

Originally Posted by Baddawg53

Guess I'm not the only one hundreds of wasted dollars into ARP hardware that doesn't fit... I have the flywheel bolts and the rocker studs sitting on the shelf

Well the flywheel bolts are going back to the vendor. If any legit ARP vendor has a problem taking them back, you can talk to ARP and they'll get you straightened out. Though, not sure if there is a window of opportunity there. As for the rocker studs, if these nuts from ARP work out, then there's a solution. As far as using them for OE, it's not possible without drilling the dimples off. I told ARP I don't see a drill bit being very accurate in that space, I think a dremel with a small grinding bit would be the safe way. But you gotta hit each rocker 4 times to flush it out. That's a lot of work to run studs on OEM trunions lol. At least the CHE's just need the smaller diameter flange nuts.

[Joey Soul]

Same happened to me with the flywheel bolts, specifically labeled for gen 5 lt1 but doesnt fit any socket in the flywheel to tighten it because its about a 19 mm in a 19.5mm hole. Called arp and theyre useless, clearly haven't tried to actually fit these bolts or match oem.

[GreyGhost702]

Originally Posted by Joey Soul

Same happened to me with the flywheel bolts, specifically labeled for gen 5 lt1 but doesnt fit any socket in the flywheel to tighten it because its about a 19 mm in a 19.5mm hole. Called arp and theyre useless, clearly haven't tried to actually fit these bolts or match oem.

The ARP flywheel bolts will probably work with an aftermarket flywheel, but obviously not a OEM. Can’t say I am a big fan of their clutch design. Did a McLeod twin disc for a buddies ‘03 Cobra years back. That thing made sense and was serious clamping force. I have no doubt the Camaro clutch holds power, but what a monster. The flywheel weighs more than the crank! It was tempting to go aftermarket but those flywheel/clutche setups cost some coin and my stocker only has 17k/mi on it, so too much meat to just throw away. Hell the discs looked barely used, very beefy. So I’ll keep the few thou in my pocket and see if the build lives long enough to wear out that OE clutch so I have an excuse to change it. I ran my OE Mustang clutch on my ‘08 at 480whp for 50k/mi before it started having slipping symptoms. Replaced it with a RAM clutch and never looked back. And that was a bottom of the dung heap factory clutch setup Ford had going on for that poor car. But then again, they only made about 280whp factory.