Speedway/UB front upper arms are popular, but they are pieces of sh*t (I know someone is going to tell me they've had them for years and haven't had a problem, congrats) . There is no bushing, its a steel sleeve over the cross shaft that you need to grease, and last I knew there was no seal.
They dont have any caster built into them so when you put 4 shims in the back, and 1 or 2 up front and tighten the bolts down you turn the cross shaft into an "S", and since there are no bushings it locks up solid. Like I said they have no caster built into them, and they arent adjustable so what did you gain other than 1/2 of header clearance? Ive seen them come apart under street use as well, totaled the car.
The adjustable uppers I make address all those issues.
Allstar doesnt actually make anything other than their -3 / -4 brake lines. So usually if its something that is fairly common, like a metric lower, you can get them elsewhere as well. IMCA still requires stamped lowers on their modifieds where as UMP does not, even though most metric clips are on nova lowers, but every hobby stock and stock car must run frame matching arms.
The reason I bring that up is a few years back IMCA techs pretty thoroughly and some stamped lowers bought right out of a catalog werent fitting into the tech mans jig, not sure if they were metric nova or chevelle lowers though, so yes there are stock "ish" lowers available.
They dont have any caster built into them so when you put 4 shims in the back, and 1 or 2 up front and tighten the bolts down you turn the cross shaft into an "S", and since there are no bushings it locks up solid. Like I said they have no caster built into them, and they arent adjustable so what did you gain other than 1/2 of header clearance? Ive seen them come apart under street use as well, totaled the car.
The adjustable uppers I make address all those issues.
Allstar doesnt actually make anything other than their -3 / -4 brake lines. So usually if its something that is fairly common, like a metric lower, you can get them elsewhere as well. IMCA still requires stamped lowers on their modifieds where as UMP does not, even though most metric clips are on nova lowers, but every hobby stock and stock car must run frame matching arms.
The reason I bring that up is a few years back IMCA techs pretty thoroughly and some stamped lowers bought right out of a catalog werent fitting into the tech mans jig, not sure if they were metric nova or chevelle lowers though, so yes there are stock "ish" lowers available.
