yfz 450 extensions in a-arms good or no?

[bmv450atv]

hey i found this extension part to widen the a-arms its cheap 180.00 and im into racing and jumping but spending up to 1000 is to much for a-arms but what im asking is do you think it is somthing good to do or no does it look like it would hold up or no? web site is below. thanks

http://www.diamondjcustoms.com/widening/yamaha/yfz450.htm

[bferg911]

The link doesn't work bro.

[motohanks]

take out the period at the end...
i wouldn't recommend them for mx or jumping

[bmv450atv]

has any one tried them?