DOES THE HDK SUSPENSION K-MEMBER HANDLE BETTER THAN A T-BAR SUSPENSION?

Regarding the Bimmer front IFS alum cradle prior posted, I'd be curious what BMW sells that for, likely that one piece costs more than the entire IFS upgrade they were offering, comparing apples to oranges.

BMW lists it for $1,019.94, but you can get it on sale for $936.88
31112284630 - 2015-2021 BMW Cross-Member (31-11-2-284-630) | Parts.BMWofSouthAtlanta.com

Which would actually be about the same ballpark as the bare XV K if you subtract out the cost of the rest of the components in their kit.

Regardless, it's clearly a "welded structural Alum suspension piece" that's made by the hundreds of thousands (at least) so definitely not something "you very seldom see if ever" . More like, something that appears commonly in modern cars.

So, structural aluminum welded K members are literally made by the millions (not just one model, not just BMW's). Refuting your entire claim, because you didn't just claim the XV aluminum K wasn't up to the task, you said ALL welded aluminum suspension pieces. A bold and utterly ridiculous claim.

I have made my case, we agree

No, you made a claim. For you to have made a case, you'd need to back up your claim with evidence. Which you haven't done in a single post you've made so far.

I've seen a challenger with their "Monte Carlo" bar. It bolts to the sheet metal of the inner fender....strange.

Yeah that's not how I would tie those areas together. Maybe useful for the intended task fulfilled by the fender to cowl braces on the 73+ A's, but for improving handling I don't think they'd do much if anything.

The diameter of the stud on the 2" is considerably larger than the 1". The 2" is just under 1" diameter. I didn't measure the 1". Allstar Performance makes many parts for the dirt track and roundy round world. While I doubt they are tested to meet OEM production car use, I'm willing to take the risk and use them. I'd imagine the life of a ball joint in a circle track car is tougher than my street car that may only see 3000 miles a year.

Ok, good to know. And I didn’t intend imply that the 2" ball joint is unsafe especially for the application. I'm mostly just curious, the OE stuff is overkill by design.

Any rim clearance issues?
Good call out ....track width is often overlooked until its too late. The ability to use off the shelf rims and custom offset rims (sometimes what the customer already owns) is a major reason HDK exclusively maintains adjustable upper and lower control arms. Believe me, non adjustable control arms are way cheaper all the way around.

I think you’ve answered this before, but how much can the track width be changed? The widest track is pretty close to the later 73+ disk track right? Is the narrow track similar to the SBP drum track?