[livin4cars]

Metco uses a heavy duty chassis mount with correct diameter bolt hole to deal with clunking and a pivoting clevis to avoid binding. Front bushing is polyurethane with delrin insert to avoid crushing. also has grease fitting.

J & M uses aluminum washers to obtain correct diameter bolt hole on factory chassis mount to deal with clunking and a hard polyurethane ball with soft outer soft cups for front bushing to eliminate binding in cornering and will not deflect on acceleration. bushing is pregreased before installation. no grease fitting.

Have not decided witch UCA to go with. will be used for street only. will use adjustable as one day will install lowering springs. any input or past experience with either Metco or J & M will be helpful

[travelers]

I have the J&M LCAs and they work great. The car pulls streight as an arrow. I do like the style of pushing also. It lets it move to keep it from binding as full solid bushing would.

[hotpart]

Originally Posted by livin4cars

J & M uses aluminum washers to obtain correct diameter bolt hole on factory chassis mount to deal with clunking and a hard polyurethane ball with soft outer soft cups for front bushing to eliminate binding in cornering and will not deflect on acceleration. bushing is pregreased before installation. no grease fitting.

We need to correct you on the washers. They are not aluminum, but rather made from 1144 stress-proof steel. The material has strength of around 180,000 psi and is stress relieved and heat treated to 32 Rockwell so they won't wear out.

[archery_tim]

No, unfortunately thats not true - or at least not with my set. I have the J&M adjustable lower control arms and they DEFINATELY come with aluminimum spacers. I wish they were steel however, because after 6 months these little fellas have become pretty distorted and in need of replacement. If someone knows of some steel versons i would sure be glad to hear it!

Originally Posted by hotpart

We need to correct you on the washers. They are not aluminum, but rather made from 1144 stress-proof steel. The material has strength of around 180,000 psi and is stress relieved and heat treated to 32 Rockwell so they won't wear out.

[hotpart]

Originally Posted by archery_tim

No, unfortunately thats not true - or at least not with my set. I have the J&M adjustable lower control arms and they DEFINATELY come with aluminimum spacers. I wish they were steel however, because after 6 months these little fellas have become pretty distorted and in need of replacement. If someone knows of some steel versons i would sure be glad to hear it!

The original question is about the upper control arms not the race version aluminum lower control arms. The uppers use heat treated 1144 steel for the anti-clunk bushings and the race aluminum lower control arms use aluminum reducer bushings. The only way they can wear out is if the control arm was not properly tightened. If you are having a problem with them give us a call or PM us with your address and we will get them replaced for you.