Detroit flywheel

Check the part numbers for the 14L and the 12.7L balancer, it's not a dampner, you should find that the part numbers are the same, the cross reference guide indicates that some of the 14L engines use the same balancer as the 12.7. You probably won't benefit from that change, it will smooth out your engine though, it should be changed about every 5-700k. Also, I doubt I would buy a truck flywheel off of Amazon, just my opinion.

As far as lightweight vs standard? If you were going for a performance based build then I would say go for it, if your going for it just to go for it. I'd say your wasting your time. Also, keep in mind that the lightweight flywheel may possibly flex more, so you may develop issues down the road. In some instances you need to remember, if it is so great to have, and makes such a difference, why aren't the oem's using it?

 

Makes sense, It must have given him a jump off the line, not mid, or too end torque.

 

Exactly.
Helped a bit to keep the rpm up when shifting, but you're already in your power band, doubt those engines dipped below 5000 rpm after a shift.

 

The Truck came originally with an OEM lightweight, it’s been swapped out along the way. As far as Amazon, it’s the same Aftermarket Manufacturer, sold by many others. The old one was almost a 1/4” thinner, and not much heavier, maybe, 15 -20 Ibs. I have no problem with aftermarket parts, Usually just as good or better as original, these days.Others just didn’t bid low enough, to get contract for original. People talk about Brand loyalty, when Car and Truck parts are all made by the same suppliers. Trans is 1850, clutch 2050, 6 pad. Replacing a 4 pad local remained clutch, that lasted over a million miles. I’m sure it will be fine. I do plan some power upgrades, during and after OH. Hopefully this clutch will last another 10 yrs, Being heavy duty, it should. On the subject of aftermarket, I used ATRO polyurethane motor mounts, less than 5 yrs ago. Replaced the original 14 yr old ones. They are already shot, rotted away. Replacing with original rubber, this time. Also will stick with original bushings from now on. No more poly.

 

It was a funny story,said he had everybody scratching their heads,

 

Actually, parts are not parts.

The manufacturer might be the same, but the customers specs might not be.

I've seen it with tires, spark plugs and a number of other parts sold at big discount retailers that carry the manufacture's name on the product, but the product is inferior to the actual manufacturer's offering.
They look the same, they cost less, but you're actually getting less.

 

I don’t know what’s up with tires, even brand name US made Bridgestones seem to be more prone to flat spots and blowouts. My last set of Chinese steers, put onto trailer, fell apart inside, peeling away, couldn’t be patched. Chinese tires are prone to problems, missing gum layers, I’m told only a few big manufactures, but dozens of brand names. Otherwise my Chinese drives have lasted as long as Bridgestone, Tread design looks identical. But I know the bigger problem is counterfeit “ brand name “ parts. Recently Timken wheel bearings, have to be careful who you buy from.